Can peer review survive unrestricted AI use by reviewers?

This is Jessica. Reviews from ICLR (one of the three biggest ML conferences) came out last Friday, and a large number of them appear to have been primarily AI-generated, at least if we believe what authors are reporting on X. I believe it. On my own submissions, about half had Pangram scores over 50% (with some papers getting majority reviews with 90+% Pangram scores). There are other signs as well, like appendix mention reportedly being nearly twice as common in reviews compared to last year. 

Was this rampant AI use in review surprising? The official review policy for ICLR 2027 permitted “limited and responsible use of AI tools to assist human writing of peer reviews and meta-reviews,” but said it was “mandatory to disclose use of AI tools,” with the review form soliciting this information and asking that if you use AI you also report your original self-written paper assessment and any LM interactions. 

It’s a little mind-boggling to me that anyone would still think asking people to disclose AI use is a viable policy. By now it should be common knowledge that when you say something like “mandatory to disclose use of AI tools” that will be interpreted as “suggested to disclose,” and no one will do it.  

It’s also a bit mind boggling that no one anticipated this mess. At ICML 2026, many reviewers who deliberately selected into a pool that would not be allowed to use AI were caught using AI by watermarking. Turns out that when you pump high numbers of papers at each reviewer their good intentions start to crumble. And ICLR received a record number of abstract submissions – over 60,000, suggesting total valid submissions probably surpassed last year’s total near 20,000. 

When reviewers feel comfortable telling authors “I have used AI tool to do the review since I do not have enough time”* something is broken. Good for that reviewer for being honest, but who is sending the impression that an AI review you produced but can’t understand is a viable way to fulfill your reviewer agreement? 

This situation makes a few things clear. One is that it’s irresponsible to give reviewers high review loads but not restrict how reviewers can use AI, at least in a field like ML where many reviewers are inexperienced and required to do multiple reciprocal reviews. 

The second thing is that it’s irresponsible not to prioritize preserving review over hurting authors’ feelings. ICLR did introduce a cap of 20 submissions per author, plus a limit of one paper per author if none of the authors qualified for reviewing. But it’s too conservative. Compare to the policy adopted by STOC, a CS theory conference, which this year capped submissions at five per author, dropped anonymity, required authors to submit a video in which they explain their paper, and reserved the right to desk reject for poor exposition. We can debate whether these are the right steps, but at least someone on that organizing committee had some balls. 

Why letting external reviewers use AI freely is a bad idea 

At this point, every author is (or should be) using AI to check their own work if they care about quality. Frontier models can find errors that you and your co-workers miss. It can suggest limitations that reviewers might bring up. I don’t send out papers anymore if I haven’t run them through Refine.ink.

So what is the point of reviewers, with less expertise on what the authors did than they have (and in ML, we’re often talking junior PhD students), meat-proxying to send them more AI-generated feedback? Seemingly none.

Consider what we lose if we ban AI in peer review. The main risk would seem to be to peer review’s supposed function as a soundness filter. LLMs enhance a reviewer’s ability to comb through 50+ pages of paper and appendix to verify that what is presented is accurate. But even if the authors are lazy and miss some problems themselves, letting individual reviewers feed papers to LLMs using basic prompts to “write a review for [conference X]” is far from the best solution. Strong LLMs too can miss major errors when not directed what to look for (see e.g., examples from Nihar Shah’s work).

Error identification and basic soundness checks are much better addressed by the venue itself, using validated AI tools. Centralize checks like whether key results can be reproduced from the provided data/code, verify whether equations, proofs, or calculated statistics are correct, detect leakage or violated assumptions, make sure key claims can be traced to evidence, and so on. There’s precedent for all of this in existing research, see Table 1 here or arguments others have made for using AI in review for such purposes here and here.

Some of these automated checks can be used to determine if a paper should be desk rejected. Some will be more controversial (and they should be, as I discuss in more detail here, because there are no hard-and-fast filters to separate good from bad science). Anything contestable can be surfaced for reviewers. 

Naturally this can shift what cues get attention during review. When we give reviewers a shared summary representation of the paper, we correlate errors relative to what we’d get if they relied on their private signals alone. But these are problems that machine learning researchers can define and study! See e.g., our work formalizing what it means to have a good LLM-implemented checklist (i.e., use review corpora to learn a set of checks that reduce the combination of bias and variance under LLM-assisted review relative to the variance you’d have from human-only review). We can also educate reviewers on what their role is–-figure out what matters that can’t be verified directly across the paper (significance, novelty, etc.) and decide how to weight the surfaced checks. 

But can’t good reviewers write better reviews with AI? 

One counterargument to banning reviewers from using AI at their discretion is that we are crippling review quality. It’s easier to get more information from a paper if you can query an LLM about it while you read. A reviewer may reach better insights if they can rely on LLMs to help them run simulations or produce counterexamples to understand the method or theory. It’s not that all AI use is bad. It depends on whether the critiques or suggestions that AI surfaces are within the convex hull of the reviewers’ expertise. If they are, the value of their review might be amplified by AI use. But when they’re not, we get reviewers confidently reporting claims from an LLM that they cannot themselves verify, which the authors may already have decided were not good advice in their own interactions with AI. This is where review becomes pointless. 

To retain the value of AI for engaging with papers, venues may also want to provide access to LLMs for interacting with the paper. This makes it possible to preserve some provenance in where claims in reviews are coming from, which authors and ACs can use to appraise reviews as needed. It becomes possible for venues to run checks that reviewers are contributing some kind of unique information to the process, rather than parroting directly. If reviewers are adding minimal information, then those reviews should be removed. 

Ultimately, we need reviewers to be using their own judgment to weigh in on the significance and importance and novelty of ideas. Otherwise fields may drift in directions that are misaligned with what the humans working in those fields value. The problem with unchecked AI use is that even when people might want to stay in control of their ultimate judgments, they are not always good at recognizing when they are taking on biases reflected by LLM output. There was a study out of Anthropic recently where they endowed LLMs with preferences that made them lean toward particular recommendations, then had people use them to do a task. The majority of the time, people adopted the preference that was endowed to their LLM, and many of them also attributed the recommendations to themselves. 

Why are we still protecting authors’ rights to submit slop?

Reviewers turning to AI en masse is a symptom of conferences being hesitant about desk reject policies. For example, at the top ML conferences, one can still submit a mostly AI-produced paper and expect a team of human reviewers to provide feedback. I’ve heard many students who are reviewing for ICLR this year complain about how many papers in their review piles were hard-to-read AI slop.

Organizers add some minimal friction for authors, and expect the reviewers to suck it up and deal with the remaining onslaught. But when you don’t prioritize reviewers’ ability to actually do their job by requiring more authorial accountability, you hasten the “review death spiral”, where as review gets noisier, authors are further incentivized to submit low quality papers, in the hopes that they get lucky. 

There are better ways to deal with this problem than the ultra-conservative don’t-hurt-any-feelings approaches we’ve been seeing. We should not be seeing teams of undergrads submitting 9 papers at a time only to withdraw them once they see the initial reviews, as reported by one AC. For example, start desk rejecting papers that are flagged by Pangram as mostly AI-written, or that are very hard to read. If an author can’t take the time to signal that there is a human on the other end who is accountable for the work, do we really owe them 3+ other humans’ time providing feedback? 

I really hope that policies tighten. As imperfect as peer review has always been, removing people from it entirely is not going to lead us to better science.

*From a screenshot of a review shared on X before the author took it down.

Science is not naturally aligned

This is Jessica. Last spring I wrote about how some AI for science rhetoric is unrealistically optimistic about how much faster science will progress now that LLM agents can tackle problems fairly independently. The vision is that we can just automate the production of truth. Since then I’ve been thinking more about why exactly this seems naive from a metascientific perspective. 

On some level it seems obvious: scientific progress has always depended on value judgments and people collectively negotiating what counts as “objective”, as well as incentives that support a pipeline of new researchers who want to become experts so they can shape future directions. So why does pushback against the let’s-just-automate-science narrative often fall flat, getting dismissed as being anti-AI or nostalgic? 

One problem is that it’s easy to sound tautological in making some of these arguments – e.g., people are necessary for science because people have always guided science. Consider what’s been playing out in math, where some see new AI-verified solutions from frontier models as evidence that there is no longer anything standing in the way to progress, leading to claims like “math is solved.” The other side insists that we also need human understanding for such results to really be progress. But by accepting the premise that correctness can be separated from understanding, the latter gets seen as an optional mental state that we want to keep around for sentimental reasons, and those insisting on it are cast as defensive protectors of the guild. 

My thinking is that a big part of the problem here is that the stories we tell ourselves as a society about how science proceeds – objectively, dispassionately, etc. – have become so ingrained that it’s hard for us to acknowledge some aspects of how scientific “truths” actually arise. For various reasons, we’ve been conditioned to think about science in terms of a value-free ideal. The pull of this and earlier scientific ethics like “mechanical objectivity,” striving to eliminate the role of human value-based judgment in science, remains strong, despite most philosophers agreeing these ideals are unrealistic. By putting automated theorizing, experimentation, and interpretation in reach, AI seems like everything the value-free ideal could ever want. And so some interpret any insistence on understanding as an obstruction to the rapid progress we can now enjoy. 

I’ve been looking for the strong reasons why science is not “naturally aligned”, in the sense that we can just remove ourselves and expect it to proceed in some spectacular AI-powered fashion. Philosophers of science have made a few arguments that are helpful here. Helen Longino has written about how to create the idea of objective knowledge, all you really only need people to believe that things exist independently of our perceptions, and a shared language. Once you have these things, it becomes possible for individual scientists to look to others to gain knowledge on things we haven’t directly experienced–critical to science being a cooperative endeavor. We can also criticize scientific claims. And criticism, when it’s functioning, drives belief change and defines conventions for how values can and cannot influence evidence. What we consider acceptable or objective gets negotiated and refined over time. It isn’t handed down from nature, but that’s how mechanical objectivity would like to see it: put the trust in procedure alone and eliminate the messy human aspect as much as possible. 

There’s also a thought experiment in the work of philosopher Robert Brandom that feels analogous to what gets lost with new fully-AI generated and verified results in fields like math, CS, stats, etc. He imagines a community where people acquire beliefs about the world through reliable processes, but they can’t provide any reasons for what they believe. If they knew that their inferences were arrived at reliably, that itself would be a kind of rationale, so they cannot know that. He asks whether such a community could have knowledge. He concludes that they cannot, despite their true beliefs about the world, because with no ability to give and ask for reasons, they can’t even have the concept of reliability. 

One way to look at what’s missing is accountability. To be able to believe things that we haven’t experienced ourselves, we need people who can answer for the results. If we buy Longino’s view of the role of criticism in creating concepts like objectivity in the first place, criticism has to have the opportunity to change something for knowledge to continue being built. Otherwise we get scientific-looking things, but not progress.

AI-verification of new AI results is interesting because it is a kind of reason we can give for believing new results are reliable. But the way we develop frontier AI models isn’t really designed to instill basic aspects of scientific accountability, leaving a  disconnect. For example, we don’t train agents to have persistent state, making it hard for them to maintain commitments or update beliefs consistently as challenges come in. There should be something at stake, so that reputation effects constrain what gets claimed.

More importantly, if we can’t engage in and defend new results because AI’s abiltiy to reason so far exceeds ours, we lose the processes that shape our human judgment capacities, so that eventually we lack the ability to judge AI’s scientific outputs at all. I don’t think we’ve gotten there yet, but its the logical conclusion if we willingly write ourselves out of the picture. At that point I’m not sure what we’ve attained by having AI do the science for us. Some might argue that this is okay in domains where all you care about is directly controlling nature, but even there it’s not so easy to eliminate the need for value-based judgment, without ending up in a weird dystopia where any ability to manipulate things around you counts as science. And so misalignment with our goals continues to be a threat. 

I wrote something longer as I was thinking about all this, published here. Curious to hear any thoughts on what else comes into play, including counter-arguments. 

Seeking to interview social scientists experimenting with LLM simulations of opinions or behavior

This is Jessica. As part of our interest in how social scientists are using LLM simulations of human behavior, some collaborators and I are seeking interview participants. We are thinking about tools to support rigorous design and evaluation of such studies, and would like to hear examples of goals and challenges that researchers who are experimenting with LLM simulations are facing.

Specifically, we’re looking for researchers in academia or industry who are currently using LLM simulations in their work and could bring a simulation dataset (and optionally, human ground truth data) that they are working with to the interview. We are interested in use cases like piloting surveys or experiments with LLMs, replacing or supplementing human participants in surveys or experiments with LLMs, or using LLM simulations for post-study analysis or theorizing. The interviews should take no more than 1 hr.

Email me and Xudong Tang ([email protected]) if interested, and/or pass this on if you know of social scientists who might be.

Digital twins version 2.0: The skeptics speak up

This is Jessica. Several years since the earliest research papers on the topic came out, the idea of using LLMs to simulate human behavior like survey responses or experiment outcomes (“silicon sampling”) is hitting mainstream. People tend to bring this up in conversation with me, probably because I’ve written about validation and taught a course, so I get to hear a lot of other researchers’ views. I would put the majority of takes I encounter in either the more agnostic, “Somebody should probably explore how much we can do with them” and/or “I’m pretty doubtful it’s going to live up to the hype” camps.  

One way to use silicon samples is digital twinning, where simulations are conditioned on considerable information about specific individuals, and expected to predict the responses of those specific individuals. Early papers on digital twins sing their praises, showing for example that they can reproduce people’s responses more than 80% as well as people replicate their own responses (e.g. here or here). But we’re now seeing a more critical empirical push, which uses novel tasks and topics and more careful design of metrics and baselines for comparison to gauge how much conditioning on more individual-specific information improves prediction. 

In the last month, there have been a few noteworthy data points. Pew Research put out a report describing what they learned from comparing digital twins implemented by giving Claude Opus 4.6 detailed 2025 survey responses and demographic persona information for people who responded to several more recent survey waves. They compute the average absolute error in percentage points for each multiple choice survey question (i.e.,the average of the absolute differences in the proportion of LLM versus human respondents selecting each answer option), and find it averages 12 percentage points over the 300 survey questions they looked at, with 28% of the questions having error over 15 percentage points. They observed several kinds of biases that have come up in other research comparisons: less variation in LLM responses compared to human (with some answer options never being picked by the LLM), stereotyping (like predicting that 97% of Hispanic adults are at least somewhat likely to follow the World Cup; in reality its only 43%), overestimating human accuracy on factual questions, and mispredicting sentiment on current events like data centers and face coverings on ICE officers. They stress how hard it is to predict how far off the LLMs will be on a given survey question.  

This list of biases closely resembles those proposed by Tianyi Peng et al. in one of the most comprehensive evaluations of digital twins to date, recently published in Science Advances: Digital Twins as Funhouse Mirrors: Five Systematic Distortions. They collect a new set of 19 preregistered studies involving 164 outcomes, and find that overall, there is only weak improvement over base models and relatively low correlations with human behavior (on the order of 0.2). 

I like this paper a lot, in particular the comparisons they do to simpler demographic prompting and base models. The intuition that has been sold by researchers and companies in the space alike is that with rich enough information about individual people, we can predict their behavior with high accuracy. To make the twins approach worthwhile, we want to see that twinning specific individuals leads to responses that predict variation between individuals better than the demographic baseline. However, some of the early papers advocating for digital twins evaluated them by looking at measures where a model can do well simply by being a good predictor of the average response. For example, you can look at the correlation between each individual’s real and twin response over a set of likert-style survey questions, but a model that does a good job of predicting on average which questions will get higher responses may appear to do well by this measure, even if it does a poor job of sorting individuals for any particular question. 

Instead, Peng et al. look at correlations between human and twin responses for a single outcome at a time, and compare to demographic personas only as well as base models, to ask how much additional predictive power the twin approach provides when it comes to sorting people into those that will respond with higher versus lower values. They find that while there’s a boost in average correlations (from 0.08 with base models to 0.15 with demographic personas to 0.2 with twins), overall the correlations remain modest, and much more modest than the correlations over questions that other papers have reported. Hopefully it encourages more care in future papers when it comes to what measures actually support the claims being made. I do think behavioral researchers and others interested in this space are gradually changing their mental models to conclude that LLMs may do a decent job of predicting population averages for well-represented populations, but they have a long way to go when it comes to modeling individual heterogeneity. There are several other papers along these lines that I haven’t had a chance to look closely at. 

How damning is this for the approach itself? I think it remains hard to say, though it certainly suggests skepticism is warranted at this point in time. The reasons I wouldn’t write digital twins off completely are 1) it is still early and models continue to improve and 2) prompting is often not the best way to recover the predictive information a model has–you can do better at opinion prediction by using model internal representations (see, e.g., this). On the other hand, ultimately it comes down to limits on how predictable individual behavior is, and while people are very predictable in lots of ways, we are also always exercising our agency and changing in subtle ways that interact with the world, which even we ourselves can’t necessarily understand or predict. So I don’t think reaching AGI is synonymous with being able to predict the majority of individual opinions and actions. I’m reminded of Matt Salganik et al’s work on the Fragile Families Challenge, predicting life outcomes from thousands of variables, where the best of the 160 teams’ models explained only about 20% of the variation on the most predictable outcomes, despite the enormous amount of data. 

What I will say with certainty is that silicon sampling has attracted some very good salespeople. I expect a lot of money will be made before anyone abandons the idea.

When journals are slow to implement or enforce policies to manage sloppy, majority AI-authored papers, reviewers can and should push back

This is Jessica. If you’ve ever reviewed a heavily AI-generated paper, you know how unrewarding it can be. For example, last week I spent a morning reviewing a paper for a  well-respected general science journal, which sounded interesting but was ultimately very marginal in terms of the delta over prior work. It had all the signs I’ve come to associate with heavy AI reliance–overloaded terms invented as unwarranted shorthand for basic statistical concepts; dense, fluent but vague writing, with lists of details and implied comparatives I couldn’t resolve even with repeated rereading; and a very incremental result—not a bad idea, just not a complete thought. It nonetheless took me over an hour and half to identify what they were trying to do and write up my thoughts in a review. 

I’m now getting requests to review such papers a couple times a week–not from minor journals but from high impact, general science venues. The majority of the abstracts I’m sent these days get flagged as 100% AI generated on Pangram, which in my experience doesn’t happen if you are exerting even a small amount of effort to control what is said. I shouldn’t be surprised; I know of junior researchers submitting tens of papers a year, and some senior ones too. But I am surprised nonetheless, that I’m being asked so often by widely respected venues to give feedback to authors who have given me little reason to believe they even understand what they are submitting. Of course AI writing is not a perfect signal of low author involvement, and LLMs can lead to much better science and better writing when used well. But see enough of these mostly AI-written papers fall apart upon closer inspection and you start becoming skeptical of anything that’s flagged as mostly AI text.

The problem is the seemingly poor enforcement of policies that these journals have put in place to avoid low human involvement papers. From a quick check, many of the top general science journals have policies about human accountability (some of which are pretty complex, like Nature’s) and most require disclosure of AI use. In some cases, substantial AI generation is prohibited (like Royal Society). But my experience with review requests from such journals and what I’m hearing from others suggests these policies are not weeding out enough of the slop. I also know that as an AE for Science Advances, I have seen a fair amount of heavily AI-authored text but have yet to see an author mention AI use, though technically our policy requires this in the paper and cover letter. In trying not to overindex on writing, I’m pretty sure I’ve sent out at least a few sloppy papers for review. With their more polished surface and layers of technical detail, low quality AI-authored papers are harder to catch on a quick skim than human-generated ones. And so external reviewers are stuck doing much of the sorting that these policies are intended to take care of. 

To better allocate my own attention as an external reviewer, I’ve started saying no to review requests when I’m pretty confident that I’m being presented with majority or fully AI-generated text. There are just too many papers to review for me to keep making time for those with little observable signal of human involvement. 

And while I don’t think AI writing detection is a long term solution, it’s increasingly seeming that we may need to add some friction to the system to push venues to experiment with policies that could filter more effectively. So I wrote this reviewer statement with Auyon Siddiq, in the interest of normalizing reviewers’ exercising their autonomy and signaling to venues that better policy is needed. 

The hope is that by encouraging researchers to assert their agency, it might help incentivize venues to move beyond the blanket “please disclose AI” statements that they don’t seem to be enforcing.

The main risk is that if many people start refusing to review on these grounds, it could make peer review much noisier temporarily. I personally think it’s worth the risk. If you use AI and detectors a lot, you get pretty good at telling when the writing involved little human effort. If you don’t use AI or detectors, you may be doing worse than chance. But if journals remain lax, we’ll likely end up with a lot of reviewers doing this kind of thing anyway. In the meantime, I recommend that reviewers take responsibility for becoming very familiar with the methods that exist, their limitations, and when they can be used without violating reviewer contracts.

There’s a much wider range of mechanisms journals could consider now: quotas on how many papers an author can submit in a given time frame, reciprocal reviewing requirements with desk rejection or future bans on submitting for non-compliance, higher standards for the clarity of writing, use of preliminary AI review to detect major issues, and so on. ML venues have been experimenting with most of these already. None of it is ideal, but when the old methods aren’t standing up to the scale of production that’s now possible, something needs to change. If we feel strongly that science requires human accountability, we should make it harder for authors to abuse the system.

P.S. Thanks to Aaron Clauset, Annie Liang, Eytan Adar, and Andrew for feedback on the statement.

What stories should we tell about science now?

This is Jessica. Like many academics, I am concerned about what sort of new steady state U.S. universities will find themselves in after the dust settles on recent transitions. Namely, the last few years have brought funding cuts, targeted visa policy, reduced demand for grad degrees, and a general brain drain to industry (particularly noticeable in AI and computer science). It’s disorienting to think that academia has already peaked, and that the prestige ranking of the R1 faculty job over the top industry research positions (at least in computer science) might be inverting. But things feel very different than they did even a year ago. The reality of there being less money available to pay for basic aspects of research really started to hit me in the last six months. Post-covid, working on campus became less lively, but now it also feels like our collective attention is anxiously focused on Silicon Valley or Washington D.C. We hold faculty meetings where we discuss things like, Is there any way we can help local faculty members who were laid off from tenure track jobs? How will we ensure we can fund all of our own PhDs, given that TA quotas stay fixed but faculty are running out of funding runway? 

To some, this is an overdue rebalancing. Nate Silver, for example, calls getting a PhD a “much worse value proposition than 20 years ago”, and predicts that elite higher ed will become “~50% less relevant in the new steady state,” which is in his eyes a good recalibration.

But it’s worth reflecting on what is lost exactly, if this dwindling of minds and resources continues. How should we think about the value of what universities provide over industry, like intellectual autonomy, or training on how to think scientifically? As a professor, I could make a list of the things that have kept me in academia–being free to work on the problems I find most important, the diversity of topics I can work on at any given time, grad students who care about doing deep work, having time to think about the best solution to a problem. But at an aggregate level, it’s less clear what the equation is.  

As I was puzzling over all this, I attended a metascience conference, where there was a panel on “the social contract for science.” This is the transactional relationship dating back to at least the 1950s, by which scientists receive public funding and autonomy and society gets the benefits of scientific research. Back in the 19th century, scholars began to make a distinction between “pure” science–research unmotivated by any particular application–and applied science. The social contract takes this distinction and further presupposes a dependence relationship: what is confusingly called the “linear model”, the idea that pure science provides the well from which applied science contributions are drawn. Threaten this foundation, e.g., by letting applied science intercept too much of the resources society puts toward science, and we risk running out of useful innovations. Or so the story goes.

The social contract for science was an attempt to cement the importance of scientific understanding to society, making it an interesting counterpart to the current moment. If the actions of the current administration to direct funds away from universities, and the possibility of using AI to produce research output without understanding, are threatening our sense of what science should be, the history of science policy provides some perspective on how our expectations got shaped in the first place.

In search of the mysterious fruits of basic science

I’ve been reading the work of philosopher Heather Douglas, who has traced and critiqued the basic versus applied science distinction, the linear model as justification, and the idea of scientific freedom as limited social responsibility (see, e.g., here and here, or her book on the value-free ideal). Popularized by Vannevar Bush after WWII, in a report prepared for President Roosevelt, basic science is a reframing of pure science, presented as “scientific capital,” providing the principles and conceptions to power new products and processes years into the future. Bush called for deliberate policy to guard against the otherwise inevitable scenario where applied science drives out the pure. One of the eventual outcomes of his report was the creation of the NSF.

But despite the pragmatic nature of basic science espoused by Bush, as a derivation of pure science, it is hard to separate from less tangible values. One is that scientific understanding is a good outside of practical application, at both the individual and societal level. The earliest advocates of pure science associated it with being closer to God. Post-Enlightenment, this view gave way to a more secular superiority complex, which implied the strong character of the pure scientist, who chose to eschew wealth. “The highest occupation of mankind”, Henry Rowland called it in his Gilded Age era essay, “A Plea for Pure Science,” which bemoaned the vulgarity of attributing scientific greatness to the applied scientist rather than the pure.

From a less moralistic point of view, we’ve been encouraged to believe that a society that has rigorous ways of understanding the world is better off over one that doesn’t. Throughout history, understanding the laws of Nature has been portrayed as a good in itself, along with an intellectual life. From this view, by educating people on how to pursue deep understanding of the world, universities provide the general good of scientific thinking to society. If we believe in the intrinsic value of reading, writing, or intellectual discussion, then it would seem we should value the university as a place that provides the kind of timespan and environment needed to develop these skills.

Some argue that the university has come to serve too many conflicting purposes (research engine, job training center, credentialer, incubator of coming-of-age experiences), and should go back to its classical roots: training in oral reasoning and rhetoric, ethics and moral judgment, historical analysis, and the cultivation of taste and discrimination. This may be a useful refocusing, but it offers little consolation for the fact that the elite research infrastructure that helped this country establish and maintain scientific leadership for decades is in the process of being gutted.

If we take our intuitions from the linear model, we might protest that innovation will suffer if universities’ research purposes are deprioritized. The post WWII science-industrial complex expanded the presence of basic research in industry, but studies suggest that the knowledge generating role of corporate R&D has been on the decline for years. To the extent that basic research is the supplier of downstream applications, it would seem we need universities more than ever.

But the distinction between basic and applied science that’s become synonymous with how we envision science has never been airtight. Critics questioned how an institution could be built around a distinction that seemed to amount to little more than a difference in intention, since applied research sometimes produced important new general knowledge, and pure science contributions sometimes had direct applicability. 

AI research is a recent example. Not only is serious money being made without necessarily requiring advanced degrees, research positions do not require PhDs. By some accounts, passing 30 years old puts one in the older demographic of researchers at frontier AI companies. Yet much of the visible innovation in frontier model development has been heavily concentrated in industry labs, including transformer models, scaling laws, and AlphaFold.

Of course, AI owes much to academia. The amazing thing about deep learning and LLMs, to anyone who was paying attention to NLP before these developments, is that after many years of AI research contributing interesting questions but lackluster results, the technology finally seemed to work. Would we have had the foundations for deep learning if perceptrons had not been stubbornly pursued by academics like Frank Rosenblatt at Cornell early on, picked up again in the 1980s by Rumelhart and McClelland’s Parallel Distributed Processing group, despite multiple periods during which consensus said connectionist approaches were unlikely to pay off?

The challenge is that arguing that “someday the research will pay off,” without being able to point to any hard evidence that basic research is, on average, worth the investment, is not such a convincing argument. According to Douglas, studies have been attempted to show the payoffs of basic research, but without very impressive results. Uncertainty about what time scale we should expect between discovery and application makes this kind of exercise difficult.

At the same time, it’s hard to dispute that monetary incentives can sometimes discourage exploration that would eventually pay off. In evaluating the role of academic research to AI progress, we should keep in mind the uniquely massive private investments AI companies have received, and be cautious using it as a general example. It would be premature to conclude that because progress (in terms of models’ standalone capabilities as measured by benchmarks) doesn’t seem to depend much on academic research at the moment, cutting off academic research would be immaterial. Particularly unfortunate about the historical contingency of frontier companies defining the direction of the field is that they are focused on a pretty narrow space of methods, evaluations, and design ideas. But the power and resources they hold give newcomers to AI research the impression that ideas outside this narrow space aren’t important.

Indulgence, autonomy, and social responsibility

As suggested above, it’s always been tempting to bring moral judgment to bear on the basic versus applied research divide. The latest moment with AI research is no exception. Does the moral high ground belong to those who are staying in academia, underfunded or not, to preserve university culture and their autonomy from corporate interests, or those who are willing to give up a comfortable job to shape the impact of AI as a product in the world?

From one perspective, the academy, as a haven for basic science, has always been at risk of being seen as indulgent. In practice, building a scientific career is in many ways a process of identity development and fulfillment for the scientist. Historical pure science rhetoric associated the pursuit of scientific truth with self-realization. But talking about personal fulfillment does not go over well when your opponent is promoting the idea that science could do more direct good for the country or humanity. Academic scientists have always been at risk of coming off as being self-indulgent, insular, or dilettante when they defend understanding for understanding’s sake. The current political moment is just rehashing old themes.

Another unfortunate historical association of basic science is with insularity and shirking responsibility. After WWI era advances in chemical warfare and explosives, the social responsibility of the scientist became a much greater concern. Philosopher John Dewey came down sharply on the idea that an autonomous space for pure science, unhindered by societal concerns, was something to strive for. Instead, he argued that this impetus to protect pure science was partly a convenient abdication of moral responsibility for the downstream outcomes of research, a “shirking of responsibility.’’

Dewey’s concerns came at a time where philosophy was itself seeking to be more scientific. According to Douglas, Dewey’s views on how philosophers should approach science–through greater integration of societal concerns–lost out to the argument espoused by Bertrand Russell, who instead valorized the “disinterested intellectual curiosity which characterizes the genuine man of science.” The latter view became the more accepted one, and our definition of scientific freedom arose in tandem with expectations of limited social responsibility. It’s not particularly surprising, then, to encounter beliefs that academia is not the place to go if you want to have impact in the world.

At the same time, it seems hard to deny that at this point of time in AI, where we have a large imbalance of power and resources, there is something to be said for the autonomy afforded by the university or nonprofit. Some beliefs about AGI coming out of Silicon Valley border on religious. My biggest concern if I were to join an AI company at this point in time would be losing my ability to think for myself about what problems deserve priority. Having greater agency and impact are attractive, but not if they come at the expense of one’s internal compass or values. As Brendan McCord said recently, “Autonomy is different from agency. Agency is getting things done…You can be more effective than you’ve ever been, and you can be less the author of your own life than you’ve ever been.” Against the groupthink of Silicon Valley, the value of the intellectual autonomy academia provides does feel real. Though it’s unclear how valuable this autonomy will continue to be if academics and others outside the big labs can’t retain enough funding or visibility into frontier model development to remain relevant.

The problem with defining progress as prediction and control 

In a 2014 article called Pure science and the problem of progress, Douglas suggests that if the pure/applied science distinction doesn’t survive scrutiny (which she argues it does not), we’re left with an account of scientific progress based on our ability to predict, intervene, and control our world. But this is not a definition of progress we should be content with:

“Any increase in the capacity to predict or control the thoughts and feelings of human beings would count as scientific progress. An increased capacity to destroy human subpopulations (through, say, targeted pathogens) would count as scientific progress. Developing new heinous capacities would count as scientific progress. Unlike Rowland, we should have no illusions that greater causal efficacy, greater power of intervention, will in fact always provide a better society.” (p. 63)

If misaligned AI, our own creation, changes how we view ourselves and the world, if it convinces some of us it has all of our best interests at heart even as it feeds our insecurities, or pursues its own goals in the background, is that scientific progress?

Douglas argues that judging real progress requires society to weigh in. When it comes to AI, this is happening through pushback against data centers, and the pace of AI progress, and the culture of Silicon Valley. Adoption matters too, but can’t be a substitute for evaluation. We need institutions independent of the companies to help interpret what’s going on. In the midst of changes to so many of our current institutions, we should expect the story we ultimately tell to take time to sort out.

In the meantime, defending academia as a category of research, or a moral standard, is a dead end. What seems more reasonable to advocate is a set of conditions — time, autonomy, training in scientific judgment, the evaluation of new approaches independent of their profitability. The value of these ingredients isn’t easily summarizable in some neat story, because what drives scientific progress is not that simple. But institutions that help society judge what’s been achieved seem worth defending.

Treating AI review like the contentious policy design problem it is

This is Jessica. Many researchers are thinking about what we should do about scientific peer review now that AI makes producing papers so much easier. Submission numbers keep getting higher — in the past week, I saw reports that the most recent ACL submission cycle got 17k+ submissions, up from ~10k last cycle. TMLR went from getting 500 submissions every 60 days or so to getting the same number ever 19 days. There are simply not enough human reviewers to handle the surge, at least not without a dip in quality. The noiser the review system gets, the greater the incentive to submit sloppy papers, because you might get lucky. This is the so called “review death spiral.” 

It is a hard problem. Quotas on submissions per author are one avenue forward, which TMLR just announced it would adopt. Not surprisingly, many reviewers are also turning to AI to help. The question becomes how to design AI review protocols to help reduce some of the noise, through preliminary filtering or flagging or helping guide human attention to parts of a paper that are most likely to be problematic. 

But what sorts of checks should an AI review assistant run on a paper? It’s useful to separate basic integrity violations AI could flag, like is there evidence of plagiarism, fake citations, missing code/data to reproduce main results (which are comparatively less controversial) from “epistemic filters,” like does the paper pass replicability checks, robustness checks, preregistration checks, statistical significance checks, etc. There’s a temptation to blur these things in proposing how to apply AI to review. It’s easy to assume that the metascientists have already established that practices like replicability or preregistration are truth-indicating and we can just implement them at scale (and indeed, ML researchers are citing open science and other reform arguments to back their proposals).

But if there’s one lesson to be learned from the aftermath of the replication crisis, it’s that there is no small, stable, non-conflicting set of detectable signals of good science that will find the good stuff and reject the bad. There are heuristics that can be useful prompts for deliberation – get in the habit of preregistering, make sure you can replicate your results, test the sensitivity of your results to choices you made along the way – but things get weird when we start treating them like universal requirements. Authors shift attention away from unrewarded signals, like better theory or exploratory work, and become preoccupied with rigor signaling through their methods. The result is not necessarily more thoughtfulness. 

And so even if the AI review tools we create are simply intended to inform human reviewers about what checks a paper passed, what we implement will have important policy implications by incentivizing more work like that in the future. I don’t think we are in a good position to predict what happens if suddenly we require multiverse robustness or statistical significance in a field like machine learning, which has in many ways been all about iterative improvement and “frictionless reproducibility” rather than individual results passing all the robustness checks.

The answer is not to avoid using AI in review until we can find a non-gameable set of credibility qualities to have AI focus on, as some have recently argued (though I agree with the linked paper that we need more rigor in how we go about motivating review tools). Non-gameability sounds nice, but any automated review policy that allocates attention will be gameable, because ensuring good science is not so simple as finding the right checklist. The relevant question is instead what assumptions and downstream incentives we are willing to tolerate. To this end, at the very least we should get in the habit of spelling out the assumptions we’re making, so that the trade-offs of focusing on particular proxies become explicit.

I wrote up this view recently in a paper called “Stop Treating Metascientific Heuristics as Quality Filters in AI Review.” Here’s the abstract: 

AI-implemented checks for reproducibility, robustness, preregistration, claim scope, and other intended proxies for scientific credibility can extend human reviewers’ capabilities. However, treating metascientific heuristics–whose theoretical grounding remains contested or incomplete–as necessary and sufficient signals for filtering out bad science is counterproductive to scientific progress. The emerging literature blurs the line between integrity filtering, based on necessary but insufficient signals of validity like reproducibility of stated results or lack of fake citations, and epistemic filtering, which uses machine-detectable signals to judge scientific quality. Drawing on critical metascience, we show that commonly proposed signals of research quality are insufficiently justified as general indicators of scientific value. The answer is not necessarily to ban AI in review, given the deluge of submissions venues are facing. Instead, in recognition of how any use of automated signals–even when deployed with human oversight–will shape attention and create incentives upstream, developers of AI review tools should explicitly specify their assumptions about how proxy signals inform on scientific quality in the context of specific review decisions. This approach treats AI review contributions as contestable decision policies that will shape future research, acknowledging the value-laden nature of scientific judgment and surfacing relevant tradeoffs. 

Rather than arguing for or against any particular proxies, I’m more interested in the methodological and philosophical mindset we should bring to the new questions raised by AI review. To demonstrate what I mean by more explicit motivation, I analyze an example review decision problem and set of detectable signals in the appendix, drawing on an analysis of how statistical significance and exact replication success relate to signal-to-noise ratios measured under error from a recent paper by Eric van Zwet, Andrew, and Witold Więcek. The takeaway is that the value of a proxy will depend on how you define the latent state you care about (e.g., whether the direction of an effect was correctly estimated, how big the true signal-to-noise ratio is), what you assume about the generating process (i.e., how the proxy noisily reflects the latent state), and what you assume about the decision-maker’s choice of actions and utility function. By suggesting this approach, I am *not* suggesting that one can validate a new review tool’s utility before its been deployed. The point is that there will be trade-offs no matter what, and the best we can do is be concrete about the kinds of  assumptions that have to hold for proxies to be useful in review, so the community can debate what risks they are willing to accept. 

In this sense, my argument is very much along the same lines as Devezer et al’s argument that those proposing reform procedures should adopt more formal methodology to avoid unwarranted overgeneralization. Once checks become part of review infrastructure, they stop being neutral diagnostics and become policy levers. Let’s start treating them as such in research on AI review.

When is detecting AI-generated text worthwhile?

This is Jessica. AI-text detectors are coming to play a bigger role in adjudicating what texts are worthy of our attention. There was the surprising case of an apparently AI-generated short story winning the Commonwealth Foundation Short Story Prize, which returns 100% AI generated by Pangram, the leading detector whose false positive rate is reported as roughly 1 in 10,000 in its own audits and near zero on medium-to-long passages in an external audit. Applying Pangram to the other 4 stories that won awards this year suggests two others were heavily AI-assisted. More recently, the NeurIPS Position Paper track announced that it was desk rejecting 18% of submitted papers that were detected by Pangram as fully AI-generated. Another 13% are getting followed up on with the authors to investigate AI use. In this case the Call for Papers made clear that submissions should be “substantially written by human authors,” so this should not have come as a surprise.

We’re having to reconsider what authorship means. Can a person create literature or express their position on a subject without writing a single sentence themselves? When do we really care who strung the words together?   

Some people think detection is a waste of our collective time because we will never reach an equilibrium. AI-generated text will keep shifting toward what passes the detector. Human writers will continually update their beliefs about what features are indicative of AI-writing, but will also be influenced to write more like AI by reading so much AI text. There’s no stable target, just an endless cat and mouse game that incentivizes being savvy enough at any given time to avoid getting flagged. Meanwhile people are being morally scorned and suffering reputational damage for being caught on the wrong side of things. This may disproportionately affect some writers (like non-native english speakers) who are finally seeing the playing field leveled a bit. 

On the other hand, there are situations where it really is important to know who strung the words together. Education is the most obvious one. It’s just very hard to teach someone to think if they’re not writing down their ideas themselves. 

The problem is that outside of select scenarios like teaching, what we really tend to care about is who controlled the ideas, and this is not equivalent to who strung the words together. Some would argue that the latter is becoming increasingly irrelevant given that AI can write more fluently than many people and many people prefer AI-generated text. 

Of course the reason we’re seeing detection used to filter paper submissions is because the ideal process–where the content of each paper is carefully considered on its own merits–is increasingly untenable given the huge surge in submissions in some fields. It’s easy to pump out credible-seeming papers with minimal human oversight using AI, and enough people are doing this to create serious problems. 

Mostly my response is that if we are going to debate the value of detection we should be willing to make our assumptions explicit. So let’s walk through a toy model to think about what we’re really conjecturing about.

One way to think of the latent state that we actually care about in paper review is the author type. Let’s say type A authors come up with their ideas and do a lot of the writing themselves. Type B authors rely on AI to do much of the thinking for them, and also use AI to do much of the writing. Type C authors come up with their own ideas, but engage in extensive prompting to get AI to write everything they want to say for them.*

For each paper, we choose to either pass or reject, conditional on the output of a Pangram check. Let’s say we only care about whether it flags 100% AI generated or not, so the signal s is binary, where s=1 means AI detected.

Based on available Pangram audits, if a text is actually written heavily by AI there is a very high chance it flags as AI-generated: beta=P(s=1|AI written) with beta very close to 1. If a text is not written by AI, there is a very small chance it flags as AI-generated: alpha=P(s=1|human written). Pangram’s internal audits put alpha around 10^−4 but other audits find essentially zero false positives for medium-to-long passages. 

So P(s=1| A)=alpha, and if we assume Types B and C use AI to a similar extent for the writing, then \beta=P(s=1|B) = P(s=1|C). The posterior probability that a flagged paper is from a Type B author is then:

P(B|s=1) = (beta × p_B)/(alpha × p_A + beta × p_B + beta × p_C), and since alpha is tiny and beta is close to 1, P(B|s=1) ≈ p_B/(p_B + p_C)

The relevant considerations become what we think the author population looks like, and how costly we think a false positive versus a false negative are. 

As a starting point, let’s say that for our conference submissions this year, Type C is the rarest, at 20%, and Type A and Type B equally split the remaining mass at 40% each. Let’s also say that we consider rejecting an acceptable paper, c_FP, to be twice as bad as passing an unacceptable one c_FN. 

The optimal decision rule is to reject if c_FN​ * P(B|s=1)>c_FP * ​P(A or C|s=1), or equivalently P(B|s=1)>c_FP/(c_FN+​c_FP​​)

With c_FP=2 and c_FN=1, this means we reject if P(B|s=1) > 2/3.

Under the prevalence assumptions above, P(B|s=1) is approximately 2/3, so we are right on the boundary. From the standpoint of making the right decisions for this particular conference cycle, it’s not obviously bad. But if Type C is a little more common, e.g., we shift a little mass from p_A to p_C to make p_C 0.25, then P(B|s=1) is 0.62, then we shouldn’t desk reject only based on the flag. Similarly if we were to decide that falsely rejecting an acceptable paper is three times as bad as passing an unacceptable one, we shouldn’t rely on it alone. 

This model is obviously very simple. But it shows us what kinds of things we have to make assumptions about in the most basic case. Obviously I don’t really know how many people are using AI blindly to write papers, nor how many people are relying heavily on AI to write up their own ideas. You should take my numbers with a grain of salt. Personally I can’t imagine how relying on AI to do all the writing when I came up with the ideas would ever feel efficient, because I tend to have strong opinions on how things are said. But I can accept I am probably more of a control freak than many others. And AI overreliance is easy to slip into. Maybe papers chairs from recent ML conferences (or arXiv moderators) have estimates on bad-actor rates based on what they are seeing. 

What this exercise can’t tell us is how scientific progress is impacted by the warping of incentives that can happen when we use AI-detection as a filter. Classic principal-agent problems suggest that when we care about something hard to observe—like scientific quality or long-term epistemic value—but must rely on observable proxy signals to judge authors’ outputs, we should expect authors to shift more effort toward improving exclusively on those proxies. Avoiding m-dashes and ‘not this, but this’ constructions and whatever else currently ups the posterior probability of AI-generation is orthogonal to the actual thinking that research requires. What if relying more heavily on AI to write up our ideas is a good idea for science in the long run, in terms of more clearly communicating the ideas or saving a lot of time, so that we can get more good ideas out in the same amount of time? Then too much emphasis on detection might slow us down. However, I’m doubtful we are currently anywhere near a state of the world where discouraging writing with AI is as costly for scientific progress as spending time reviewing and reading many more questionable AI-generated papers is. The bigger threat at the moment is the slop overwhelming our ability to find the good stuff.

*We could also posit Type D authors that get AI to generate the ideas, but then write the papers themselves to evade detection, or are extremely good at getting AI-written text to evade detection. But this seems much less likely so I’m ignoring it.

What if scientists really were dispassionate observers, communicating ideas without irrational commitment? Look here, says AI.

This is Jessica. We often idealize science as proceeding primarily by the scientific method, where scientists approach the objects of their investigation with a healthy dose of detachment and neutrality, who become convinced only when the evidence is there, and remain open to changing their mind if new evidence becomes available. But in reality we see examples of authors becoming personally attached to their ideas despite the data, slipping into advocacy and becoming defensive or going into denial mode when presented with clear evidence they were wrong.

The seemingly irrational attachment to the ideas or findings can seem easy to dismiss as a bad thing. Yet there are also times when having some level of personal commitment makes one more effective at certain roles that scientists must play. For example, being too transparent about our own uncertainty is not always effective when presenting research to others, because the audience can become distracted and stop listening entirely, even if you have some useful insight to convey. My question is, What does our ability to now use AI to generate implementations, presentations, and even the ideas we work on themselves add to the mix?

I got a glimpse of this recently. May ended up being workshop month for me, with at least one each week. I saw a lot of presentations. A couple of these showed me something I hadn’t yet seen, at least outside of student presentations: talks comprised of obviously AI-generated slides. If you’ve tried to use the non-design optimized versions of models like GPT or Claude to create slides yourself, you will know what I mean. Almost every slide has content organized in a grid. There’s too much text—full sentences or nearly so in multiple places, headers and footers, and stylized phrasing everywhere, like “principal design levers” and “load-bearing assumptions” and “actionable pathways”. 

These were not presentations by overwhelmed junior faculty or researchers I’d never heard of. They were by prominent researchers who are respected in their fields. 

Needless to say, they were not very effective talks. The slides tended to have too much going on to parse in time, with way too much text. The vague phrasing was distracting, making me wonder what exactly the presenter meant by terms like “governing frictions” or “strategic bottlenecks” and whether they write like that in their papers too. Part of the problem is that the presenter tends to use their own language as they present, rather than reinforcing what’s on the slide, so you have two competing streams of information that feel like they’re from two distinct viewpoints, one which is quite confident and willing to summarize and even exaggerate, the other more reserved. 

It makes sense that you’re more likely to hold at a distance what you didn’t come up with yourself, subconsciously at least, even if you think you’re selling it. In one case, the speaker also described how some of the results themselves were discovered by AI, which probably further contributes to the impression that they hadn’t fully committed to what they are presenting. 

This has me wondering what the impact on diffusion of ideas will be as it becomes more standard practice to rely on AI for implementation in scientific production and communication. It’s funny how reserving skepticism for your own results often comes up in discussing epistemic virtues, but when speakers present as if holding their work at arm’s length, the result is not so informative. As we rely more heavily on AI in all stages of research, will we face more challenges in getting others to adopt our ideas? 

It’s also another reminder of how few people thinking about AI for science seem to have considered all the personal stuff that goes into the practice of science, with lots of irrational investment and fixation and stubbornness and pride to drive the loop of discovery and validation and communication. Scientific discovery may be an “ocean,” to borrow an analogy associated with Leibniz, but surfing it requires strapping oneself to a board and committing to seeing where it gets you, not just keeping it in sight while you splash around somewhere else. 

This also leads to a practical question of how you instill a sense of ownership, or at least commitment, to ideas that were partly produced by AI. My own experience is that it takes a lot of time to verify AI produced results before I get to the level of confidence I’d have if I’d done it myself. For complex tasks there will inevitably be decisions made along the way, e.g., about how to parameterize certain things in implementation or to deal with edge cases or other exceptions. Each of these has to be reconstructed before I can really feel that I stand behind the output. 

Is there an alternative? It makes me think of the “baking guilt” that housewives supposedly felt after cake mixes came on the market, because they only required adding water. There was a loss of a sense of personal contribution and emotional ownership. The solution, which persists today, was to have them add an egg. Some psychoanalysts went so far as to interpret this as symbolic of their fertility. For AI-aided science, the closest thing to adding an egg seems to be having agents explain at length to you what was done, which can still mean a big improvement over implementing everything yourself, but not as much of a boost as it first seems.

At any rate, interpreting the new challenges of AI-generated presentations of potentially AI-generated ideas as an aesthetic problem, or of “putting style before substance,” does not seem right. Scientific ideas don’t diffuse as bare propositions. They diffuse through people who have developed some passion for them. If we’re talking about AI for science, we shouldn’t be ignoring scientists and their relationships with what they do.  

The “humans are imperfect reporters too” defense for ascribing little thoughts to machines

This is Jessica. In my last post about the tension between the necessity that we ascribe human folk psychological concepts like thinking and reasoning to machines and the problems that arise when we overinterpret them, I briefly mentioned a defense I sometimes hear for anthropomorphic terms. The defense goes like this: We can’t protest the application of words like reasoning or belief or desire or understanding to AI because humans are also not always trustworthy reporters of the latent states that these terms refer to. And if humans can’t demonstrate full awareness of their reasoning process or their beliefs or their understanding or their intentions, why should we expect AI to? So, the argument goes, it is asymmetric to require complete faithfulness of LLM traces to some latent state. That would be setting a higher bar than we currently use with humans.

This line of reasoning takes two things that may resemble each other on the surface (e.g., what humans report their reasoning or belief or intention to be, and what machines report) which we have no solid reason to believe are produced by similar processes, and says they cannot be distinguished because we expect both to be reported with loss.

It’s bad logic. But more than that, it occurs to me that by doing this we indirectly deny the value of our subjective, non-verbal experience. It’s true we may not be able to faithfully report how we reasoned or what exactly we desired or intended or understood. But part of the reason we have terms for these things is because we perceive a distinction between more genuine and less genuine versions of them within ourselves. These qualitative distinctions are how we come to believe that reasoning and belief and intention and desire exist in the first place: because we can perceive them as being authentically present to different degrees in different situations, even if sometimes we seem to be mimicking the real thing rather than really doing it. It’s what licenses researchers to keep trying to study these things in people despite the difficulty of getting an unbiased read. I’m not saying we shouldn’t look for analogous processes in machines. But we should acknowledge that the referent for these terms is grounded in subjective experience. Among humans that has worked fine, because we assume ourselves to share an understanding of what it’s like to have an inner life.

Andrew recently analogized chatbots with being in autopilot in conversations that occur in a meeting, where if you have a rich enough memory bank of observations related to what the speaker is saying, you can spout appropriate conjectures and feedback without having to exert much conscious effort. But I think fake thinking extends to much more than just being on autopilot in conversation. It can seep into all of our decisions, whether about research ideas or methods or life decisions like what job to have or where to live. It’s very tempting to live by patterns, even when it’s not what you feel you actually want.

Our perceptions that there are more real and more fake versions of our own thinking or reasoning or belief or desire is what makes us feel more “alive” or “awake” in some situations over others. It connects us to the present. Only when we try harder to do these things authentically or recognize the motives that are actually driving us (despite the explanations we might want to assume) do we feel like we are really living, rather than just performing some role. And so our ability to perceive the difference seems intimately connected to the process of understanding ourselves.

From this angle, it is unfortunate how much of the AI rhetoric we’ve come to take for granted (at least in machine learning) — i.e., AI as scientist, AI as decision-maker, etc.— enacts this implicit move of equating human and machine processes by their outputs, and consequently subtly devaluing the role of our internal reality in giving these terms meaning. We take examples from the few domains where language can fully capture reasoning–math, coding–and we reduce all reasoning or thinking or intention to what can be made manifest.

Maybe this helps explain why there’s so much emphasis lately in certain circles (including tech) on being “high agency.” We become more insistent about shaping our external world as we lose appreciation for our internal one.

“As our daily lives involve ever more sophisticated computers, we will find that ascribing little thoughts to machines will be increasingly useful in understanding how to get the most good out of them” but “we must be careful not to ascribe properties to a machine that the particular machine doesn’t have”

This is Jessica. Maybe one of the biggest crimes of academic computer science (besides routinely ignoring prior work and making up social science to suit our needs) is our tolerance for abuse of language. We take technical things and inject them with social significance without thinking through what we’ve implied. This is perhaps forgivable in early stages of research when we’re trying to get more people excited about exploring some direction, but at some point people start taking things more seriously and we find ourselves committed to terminology that overreaches. Then the question becomes what, if anything, we should do about it.

Previously it didn’t feel like such a crime to talk about intelligence or learning in machines because nothing really worked that well, so the labels were clearly aspirational. But now it’s much easier to believe the simulacra. And so it becomes harder to tell when we are using human-oriented terms as a predictive convenience versus a scientific claim versus a marketing device. There are ramifications of referring to models’ reasoning or beliefs or chain of thought or explanations or intentions. Lots of people—from end users having personal relationships with models to media and AI companies themselves referring to “parenting” the latest models or asking if they can be “children of god”—are taking models too seriously. It’s bad enough in a computer science context that I now take for granted that if I want to refer to participants or scientists or decision-makers, unless I mean AI, I should add “human” in front, because otherwise the audience will assume I mean AI agents. Someone reminded me at a workshop recently how silly all this sounds to people who aren’t used to it. 

Too much casualness with words is unscientific. There was no good reason in the first place to call the token sequences a model produces when we ask it to “explain its reasoning” reasoning, other than that’s what we wish we could see. What an LLM is doing is distant from what happens when a human thinks about something, even after all the RL post-training. Similarly, we call lots of things “explanations” when we have barely begun to figure out what causal evidence we’d need to see to claim the output faithfully explains the model’s process of arriving at it.

But it can also seem unscientific to simply declare that “only humans can have beliefs” or “reason” or “provide rationales.” There’s no non-arbitrary line that we can draw between systems whose makeup or behavior truly warrants applying constructs like beliefs and desires and those where it is simply convenient to act as if they have these qualities. If you’ve ever tried to take beliefs seriously, from a decision theoretic perspective, you quickly come to realize that the “real” beliefs we assume a person has are a mythical thing that we will never directly observe, and you fall back on equating “beliefs” with a simpler idea: the probability distribution we arrive at after an elicitation process.

Much has been said in defense of a functional perspective toward using folk psychology terms with machines, where we decide what’s appropriate based on the predictive validity of the terms for our own understanding and use. John McCarthy wrote in 1983 that anthropomorphism can be a good idea “when it says something that cannot as conveniently be said some other way.” He argued that ascribing mental qualities and processes to machines helps us “understand what they will do, how our actions will affect them, how to compare them with ourselves and how to design them.” Perhaps the best reason to do this is that we get to draw on our existing familiarity with what phrases like “wants” do and do not convey; e.g., we all understand that if we say “The dog wants to go out”, that doesn’t mean that the dog believes itself to be capable of wanting or even that it’s conscious of what it wants, there’s just a sense in which it is trying to get to the state of being outside. 

The functional perspective has led to some strong statements suggesting that it is not only valuable to apply psychological terms to AI, it is necessary. These arguments often refer back to Daniel Dennett’s distinction between three stances we can take to machines: the physical stance, which is about its physical levels of organization, the design stance, which involves understanding it in terms of the purpose it was designed for, and the intentional stance, where we try to understand it by ascribing to it beliefs, goals, intentions, likes and dislikes, and other mental qualities. For example, philosopher Keith Frankish argues that “it remains true that adopting the intentional stance is the only way of interacting with an LLM in any interesting way; indeed, an LLM-powered chatbot that couldn’t be viewed as an intentional system would be completely useless.” McCarthy writes that “Long before we can make machines with human capability, we will have many machines that cannot be understood except in mental terms.” Similarly, about ascribing to a machine the concept of “trying” to do something, he says  “If the machine may do something we don’t know about but that can later be explained in relation to a goal, we have no choice but to use `is trying’ or some synonym to explain the behavior.” 

But forty-plus years later, McCarthy’s piece reads mostly like a defense of a very basic kind of debugging value of trying to imagine a program’s “state of mind” in situations where there’s little risk that we’re going to start mistaking the program for human-like in other ways. He wants to claim that when a thing is designed to act as if it had a certain belief, it can be better understood and manipulated by assuming it’s capable of that kind of belief. But surely he would agree that if a person who is suicidal is interacting with a language model that speaks as though it fully understands the complexity of their situation and what is best for them, it still isn’t always in the person’s best interest for them to take for granted that it does understand.

The dilemma is how to lean into the intentional stance when it helps, but to avoid overreaching. This seems hard. When you first start programming, you realize how easy it is to assume a program is smarter than it is. We are not very good at recognizing when we have slipped from reasoning “as if” to projecting. When technology slots into our human vulnerabilities, like our fear of intimacy and desire for companionship “without the friendship“, as Sherry Turkle said, we are in trouble. Even McCarthy calls it problematic to assign emotional qualities to machines, at least in his time, because “We have enough trouble figuring out our duties to our fellow humans and to animals without creating a bunch of robots with qualities that would allow anyone to feel sorry for them or would allow them to feel sorry for themselves.” 

Another reason to think carefully about the language we use is that it may shape what we can imagine in the future. This last part of McCarthy’s statement–“without creating a bunch of robots that would allow anyone to feel sorry for them”–hints at how what we project onto machines can shape how we go on to create them. It certainly seems possible that aspirational labeling played a role in getting us to a point where we have models producing sufficiently human-like outputs to have us gushing about their thinking process. I’m reminded of the color perception studies by Berlin and Kay, who found that what color chips different populations could differentiate was predictable from what color terms were available in the vocabulary, as if what we can name defines what we can see. At one extreme, Lucy Suchman argues against unquestioning acceptance that “AI” itself is a coherent thing, because it reifies it as a category for future investment. 

For Frankish, the line should be drawn at assigning communicative desires to models; they are playing a communication game (human-like chat) for the non-communicative reason that they are trained to play that game. Ascribing this single desire is enough to get us all the predictive power of the intentional stance. Consequently, we make a category error when we fall prey to stunts like giving a retired model its own blog because it requested it: we should expect an LLM to say things like this because it is designed to roleplay. Elsewhere I call this kind of mutual sympathetic relationship with AI “idiot compassion,” a phrase borrowed from Buddhist monk Chogyam Trungpa.  

But couldn’t humans also just be playing a chat game? Why is it ok to say a human is reasoning or has intentions or desires, when we don’t know exactly how those concepts map to observable physical processes?  Frankish argues that our linguistic behavior is corroborated by various non-linguistic sources in a way that LLMs’ is not.  He talks about a difference in our ability to hold epistemic stances toward statements (what Dennett would call “opinions”) from that of LLMs. We can conceive of assigning different levels of credence to statements. I can repeat something someone said verbatim without believing it, or I can be fully committed to the truth of something I say in the sense that it will guide my future behavior. LLMs can do this too, but their opinions lack grounding “in a web of non-linguistic behavior in which a wider range of desires can be attributed.” It’s a shallower form of epistemic stance, at least at the current moment of development.

I like AI, but I don’t like contributing to thoughtlessness. Better semantic hygiene seems warranted, even if it seems like the ship has already sailed. We could shift emphasis to the interpreter (us) by referring to the “human story” or “human pleaser” or “anthropomorphism fulfiller” instead of the chain-of-thought or reasoning or thinking trace. Or we could just add “fake” before whatever humanization we prefer, i.e. the “fake thinking trace,” or “fake reasoning.” I also like “so-called reasoning,” like I like “so-called replication crisis” as a way of pointing to a concept while questioning the expectation. 

P.S. Thanks to Manesh Agrawala for a conversation that inspired this post. 

P.P.S. Some of these McCarthy quotes appear in Recursion, the play Andrew and I wrote!

Show me science

This is Jessica. Lately I’m thinking about how AI review changes the scientific evaluation process, and by extension what authors are incentivized to report. Some speculate that the scientific paper, as a summary of the research for other humans, may be on the verge of becoming obsolete or at least less important. Instead, we may see more raw summaries of just the facts. The idea is that if LLMs are increasingly the consumers of research, we don’t really need all the baggage of narrative and illustration to make things more relatable to humans. 

Last November, Tom Dietterich asked for opinions on social media about what arXiv should do about papers that are bulleted lists, like this:

bulleted list of results with little narrative

Some of the impetus to reduce narrative in papers predates LLMs.  E.g., even before the appearance of chatbots in 2022, people were arguing that we should get rid of or restructure Discussion sections in scientific papers, because authors are often tempted to use them to drift into rhetoric (“spin”) and unwarranted speculation. But most papers still include them. Maybe LLMs will be the impetus that actually shifts the norm.  

However, there are lots of ways to contextualize scientific contributions that are not simply rhetoric, and which are already disincentivized more than they should be. Some move in the opposite direction from adding interpretation, such that omitting them is like withholding the information readers need to judge the work. 

For example, one of my pet peeves with the way many AI and machine learning papers get written is that showing examples of the task is de-prioritized in order to fit in more results, especially in the main paper text. It’s very hard to evaluate how much improvements in performance matter if you aren’t given a single concrete example of the problem being solved! You made an LLM reviewer that’s great at finding errors in papers? Show me some examples of the kind of errors it’s detecting, so I can judge how much this moves forward our ability to verify science. You made a benchmark for the fairness of visual language models? Show me what the image and text prompts you’re testing the model on look like, so I can judge whether I agree that you are evaluating something meaningful versus a few people’s conception of what is politically correct. Instead we get high-level verbal descriptions of the kind of task (“detecting errors”, “fairness”, “content moderation”) and/or references to datasets, followed by lists of metrics and comparisons of how different models or algorithms performed. 

What’s weird is how comfortable entire fields can become going through the motions of evaluation without treating the task itself as part of the science. But authors are incentivized to bury the details by tight space limits on the main text, and to avoid giving reviewers more to pick apart. 

For us as human readers, seeing the examples often prompts a kind of common sense judgment about how “real” the problem is, making it harder for authors to pass off research that makes progress on made-up problems. But how much a task is likely to matter in the world is not the kind of thing current AI models are particularly good at evaluating. This makes me think of lots of other “just show me…” guidelines that tend to improve people’s ability to assess science:

Show me the plot: Don’t give me a big table of numbers, plot your coefficients so effect size and uncertainty dominate over significance (though you can still easily get that if you want by seeing which estimates include 0).  

Show me the variance: Don’t just show me the uncertainty in parameter estimates, plot the measurement variation. We found this reduced overestimation of treatment effects by lay people by a fair amount in this paper, and my coauthors also found similar effects with experts.   

Show me the interface: When gathering data from humans (whether ground truth labels for training or aligning a model, or behavioral responses to some experimental task), show me what they saw and how they were asked the questions, so I can judge how hard their task was, what biases might arise, etc. 

Show me the prompt: The LLM version of the above. If it’s long you may not have space in the main body of the paper, but all the prompts you used should appear somewhere.

Show me the failure cases: Seeing what instances throw a model or system off says a lot about how much progress has been made, and how the model may be succeeding in the other cases.

Show me the baselines: Improvements are meaningless if the reader has no idea what’s being improved over. Give the reader a bit of intuition about how the other approaches work, including the dumb ones you should definitely be beating. 

Show me the design analysis: I was on an open science panel last week where someone asked what they should look for as a reviewer and what they should report with their own experiments to help readers evaluate them, beyond open data and code. I said that something I often request in reviewing empirical papers is information on how the authors chose study design and sample size, including what effect estimates they were prioritizing with what intended level of precision or power. It’s easier to make sense of what’s been learned if you know what the authors were attempting.

Show me the raw output: Whenever you are doing qualitative coding of model outputs (or human responses for that matter) show me a couple examples of the original texts for each possible code. 

Some of these may be informative for LLM reviewers as well as humans, in the sense of helping them predict consensus human judgment on the paper, but others (like plots instead of tables of numbers) probably not so much. 

Fraud and the false optimism of AI for science

This is Jessica. “Scientific doomerism” seems to be everywhere lately, from a presidential statement that promises to restore “gold standard science” from the top down because scientists have botched things, to journals being inundated with AI-produced papers, to sleuths like Reese Richardson documenting the scale of organized scientific fraud through paper mills and collusion. In his post on this last example, Andrew wrote something that caught my attention: 

And, yes, typing some prompts into a chatbot and producing a paper is fraud, in the same way that publishing textbook excerpts as if it were new research is fraud, or copying from wikipedia as if it were new research is fraud, etc etc. It doesn’t require fake data and it doesn’t require some cackling Snidely Whiplash attitude. It can be some schlub sitting at a computer terminal who wants to get his contract extended or get admitted to a Ph.D. program or whose adviser is pressuring him to get some publications . . . But it’s fraudulent publication, not the same as bad research (which is actually research, it just happens to be useless because bad measurement and kangaroo).

There are clearly some differences between passing off work containing fake evidence you purchased from paper mills and work that you contracted AI to do for you–in one case you are paying money for someone to pass something fake off as real with your name on it, whereas in the other you might be using actual data and think you’re just saving time, especially if you’re reviewing what the AI does. So should we really consider both forms of fraud? 

It struck me how sharply Andrew’s perspective contrasts with the current direction of discussions among ML and other researchers interested in AI for science. There, it’s seen as inevitable and not necessarily morally problematic that the future of science will have humans largely playing the role of curators, who prompt and select among results produced by LLM agents, who do the bulk of the work. It’s worth considering what kinds of ethical lines this crosses exactly. 

Let’s imagine that I give an LLM an initial high level research question related to a topic on which I am knowledgeable. It churns on the idea and ultimately designs an experiment it’s happy with, I review the plan before prompting it to continue, maybe tweaking slightly, like changing a condition or suggesting an additional robustness check. It then gathers data on my behalf (e.g., running an online experiment or downloading existing datasets), conducts the analysis, and presents me with the results. I review these and then give it permission to write up a paper. I read the final paper to make sure I know what it’s saying before I submit. Maybe I change a few things I don’t agree with. I add my name and also credit the AI. In other words, there is a light human touch throughout, but much of what is presented as my work comes from the model.

From an “optimistic” AI-for-science perspective, the strongest argument is probably to cast it as part of the scientist’s job to try to make the most of current technology. If we think AI might help us be more productive, then we should explore how much time it can save us, just like it was a good move for statistics to embrace the computational revolution that made previously intractable models commonplace. Proponents of AI for science argue that it is irresponsible not to use AI given its current capabilities, just like it could be construed as irresponsible for a brilliant researcher to refuse to use calculators if doing so meant they could contribute more useful advances to the field. Of course, this assumes that we won’t be sacrificing anything vital in the process. 

The “pessimistic” view of AI generated science as fraud thinks we are sacrificing something vital in the process. But what is it exactly? If you believe that “the devil is in the details” (or “God is in every leaf of every tree”, depending whose side you want to be on) then whenever you outsource decisions you would otherwise make yourself, you have potentially compromised the work from the perspective of your own expert judgment. So putting your name on it betrays what you know to be true of good science. Of course, you could check everything down to the lowest level, and intervene whenever the agent tries to do something you don’t agree with. Then the AI is really just a means of computation–even if you use it for brainstorming what research questions to ask, you could view it as a way of extending your limited resources but without sacrificing your own scientific judgment. This requires that you are knowledgeable enough to assess everything it does. Assuming you are, then it seems hard to argue that this is fraud. Though admittedly, a lot rests on how careful you are when you check things over.

Part of the concern may be that AI makes it tempting to extend your methods or claims outside of what you know well. Without the option of using it, you would have had to do the research yourself (and presumably gain understanding in the process) in order to apply that method. Relatedly, I suspect most people would agree that when you are in a training context, like taking courses in grad school, turning in work that was largely driven by the AI is a form of fraud because it holds you back from gaining the understanding yourself. 

Another version of the fraud argument focuses on misattribution of ideas. Maybe this is what Andrew had in mind when he wrote “publishing textbook excerpts as if it were new research is fraud, or copying from wikipedia as if it were new research is fraud.” If the AI produced significant parts of the contribution, like the specific hypothesis, the choice of methods, and the framing of the contributions, then those aren’t your novel creations and adding yourself as author is misattribution. But this is tricky because human scientists also recombine existing ideas, methods, and frames constantly, and we often call the resulting combinations original contributions. So the question isn’t whether ideas are derivative per se but when the degree of derivation crosses into infringement. We have copyright law for some creative domains, and we can try to formulate when AI outputs are permissible in light of this (e.g., Annie Liang has some recent work on this). But to say AI-assisted papers are fraudulent on such grounds, we’d need to work out what the scientific analog of substantial similarity is. This is hard because science explicitly values building on prior work. But we can agree on some things, like you shouldn’t do something that is too close to others’ work without citing them.

A final angle on why its fraud might be that it misportrays what science is more broadly. If you think the reasons to do science are fundamentally human–that as scientists we are concerned with producing understanding for ourselves just as much as we’re concerned about improving things in the world–then you could argue that for science to be meaningful we have to be the ones coming up with the ideas and shaping them as we go. From this perspective, automated science isn’t inherently wrong, it’s just missing the point. AI for science arguments often completely overlook the “people production” role of science. In the extreme, they envision AI finding solutions for lots of real world problems and intervening to control outcomes in the world without us understanding how any of it works. In reality, the personal side–including the search for personal fulfillment through science–is a big part of why smart people who could potentially make a lot more money in applied roles end up choosing research careers. And it’s a big part of how we evaluate scientists. How many of your Ph.D. students have gone on to competitive research positions? What does the trajectory of topics you’ve worked on say about your research taste? 

Pushback to this argument might point out that by saying science is entirely a matter of human careers, we contradict claims that we as scientists like to make, about how we are dedicated to improving the state of the art in our field, or producing value for the world. Would it still be science as we know it if we started acknowledging that it’s really about personal fulfillment for scientists? But I think this is a bit of a false dichotomy. The public value of science depends on there being humans who find the work meaningful enough to do it well, including pushing back on sloppy results, exercising their taste to shape the direction in their field, training students worth training, etc. Careless AI use can threaten this by flooding the system with outputs that crowd out careful work, disincentivizing the people who would be intrinsically motivated to do quality work less likely to stick around. It also implicitly reframes science as nothing more than a pipeline for results.

My view is that AI use can go either way, depending on how you approach it. What best determines whether it’s fraud or not is the attitude you bring. It can help you do less fraudulent research if you’re the kind of person who is already very picky about what you send out to the world. But it can help you fool yourself and others if you let competitiveness and obsession with metrics drive how you use it.

As a final comment, there’s some irony in using terms like “optimism” to talk about this. I described the pro-automated science argument above as “optimistic,” because I think that’s how many in this camp see themselves–as fundamentally optimistic about the future of science and our ability to improve it by using AI. But the underlying motivation to figure out how to produce papers with as little human oversight as possible is also often deeply pessimistic. A common narrative is the “review death spiral”: AI production stresses the review system, which increases the noisiness of paper acceptance decisions, which further incentivizes submitting sloppy AI produced papers. The answer is presumed to be putting more AI in place on both sides. The idea that scientists have agency and could continue to shape the meaningfulness of what gets produced starts to seem out of the question.

Increasingly, a lot of the most enthusiastic pro-AI discourse (including for science) strikes me as nihilism masquerading as optimism. We have people who perceive themselves as huge optimists that will reshape science or society for the better simultaneously lacking the imagination to see beyond their own technological determinism. It reminds me a bit of the “optimism” associated with some open science and science reform positions, who also suggest that we just need the right technology to fix the problems (though in this case, its heuristics like replication or preregistration). It’s a fundamentally non-agentic view of human scientific endeavor. 

Epistemic Virtues for Science in the Age of Automation

This is Jessica. Back in the 1980s, novelist Italo Calvino developed a series of six lectures describing literary virtues he felt should be enduring regardless of how the world changed: lightness, quickness, exactitude, visibility, mulitiplicity, and consistency. These were published as “Six Memos for the Next Millennium” in 1993.

We aren’t on the verge of a new millennium, but recent advances in AI make automated evaluation and production of science increasingly possible. This raises the question of what qualities we should most be trying to preserve as processes change. It got me thinking it’s a good time to undertake a parallel exercise to Calvino’s, but for science. 

I enlisted Andrew and Berna, and as a first step we are seeking input on which “epistemic virtues” practicing scientists see as most critical to uphold. By virtues, we mean any durable qualities of scientific character and practice that shape how inquiry is conducted, claims are framed, evidence is evaluated, and disagreement is handled. At the link below, we compiled a set of candidate virtues for you to consider, and ultimately rank your top six. 

The virtues are Accountability, Apoliticalness, Authenticity, Awareness of Contextual Dependence, Coherence Seeking, Consensus Seeking, Curiosity, Discernment, Epistemic Cost-Benefit Awareness, Epistemic Fortitude, Epistemic Humility, Epistemic Pluralism, Impartiality, Indifference, Intellectual Autonomy, Intellectual Humility, Precision, Preference for Generality, Reproducibility Seeking, Reputational Grounding, Responsibility, Seeking Contestability, Seeking Correspondence to Observable Reality, Skepticism, Transparency, Unsettledness.

We provide short descriptions of each, and you can also tell us whether you think we missed any important ones.

We’re hoping for broad participation from researchers on this! If you are a faculty member, research scientist, postdoc, or senior Ph.D. student in any area of science, please take five minutes and fill it out. We’ll share the results widely along with some reflections. 

Survey link:

https://docs.google.com/forms/d/e/1FAIpQLSc_jHOrXpFMF3CKgHXfnUhZzeHLnagh3S1G5Kg8ZCyLPXUgxg/viewform?usp=sharing&ouid=103049774617868167713

Acknowledgments: Thanks to Carl Bergstrom, Pam Reinagel, and Tian Zheng for providing some of the candidate virtues.  

New course on generative AI for behavioral science

This is Jessica. It feels like an “old” course now that the quarter is almost over, but this winter at Northwestern I taught a grad seminar on Generative AI for Social Science. The goal was to survey emerging applications of generative AI (mostly language model agents) in the social sciences, with special attention to methodological and metascientific concerns that come up when AI is used to simulate or substitute for human observations or labels. I became interested in this topic last year as a result of the problems it presents to inference, but also the opportunities it may present to improve behavioral research, which we recently discussed here. 

I joined up my computer science section of the course with a Communications section led by my colleague Aaron Shaw, which resulted in a good mix of students across AI and social science. This was great for discussion, as many of the Comm students were experts in survey methods or psychology, while the CS students were more knowledgeable about how transformers work and methods for probing their internals. We also organized a workshop on validating generative AI for social science in February, which some of the students attended and therefore got to see the authors of the papers they were reading present them live.

The only downside of mixing backgrounds was occasional friction with the more formal methods papers. A few times in class there were dismissive jokes made about the more statistically-demanding papers, I assume as a result of people finding the content challenging. The course was advertised as requiring grad-level experience in stats, so they should have known what they were getting into, but I think sometimes people read these things and assume it doesn’t apply to them. My stance on these things is typically that as long as you’re doing your best to understand the material, it’s not a problem and I’ll help you get through it. But I don’t have a lot of patience with the attitude that because it’s challenging to you, it’s ok not to try to understand it. Especially in a class about why we need to take seriously the challenges that LLM simulations present for drawing valid inferences about human behavior!

This week they present project proposals, which include things like exploring new prompting architectures based in cognitive theory, using ML interpretability methods to steer models in ways informed by social science, and studying belief elicitation and uncertainty expression in language models. It’s a good topic for a seminar course because there are lots of aspects of methods that haven’t yet been explored, and thus lots of opportunity to bring social science theories to bear on how we interact with language models, or to apply the latest methods in AI or stats to behavioral science questions. 

Week 1: Course introduction:  Can generative AI transform social science?

This week we set context, reviewing proposals that argue for the transformative power of generative AI for social science.  

Optional:

  • Dillion, D., Tandon, N., Gu, Y., & Gray, K. (2023). Can AI language models replace human participants? Trends in Cognitive Sciences, 27(7), 597–600. https://doi.org/10.1016/j.tics.2023.04.008.
  • Anthis, J. R., Liu, R., Richardson, S. M., Kozlowski, A. C., Koch, B., Brynjolfsson, E., Evans, J., & Bernstein, M. S. (2025). Position: LLM social simulations are a promising research method. Forty-second International Conference on Machine Learning Position Paper Track. https://openreview.net/pdf?id=cRBg1dtj7o.

Week 2: LLMs as surrogates I: Attitudes, opinions, social behavior 

This week we start to read papers that evaluate how well LLMs can act as surrogates of humans. These readings focus on studies that use them to simulate human attitudes, opinions, and social behavior.

Optional:

  • Chuang, Y.-S., Goyal, A., Harlalka, N., Suresh, S., Hawkins, R., Yang, S., Shah, D., Hu, J., & Rogers, T. (2024). Simulating opinion dynamics with networks of LLM-based agents. In K. Duh, H. Gomez, & S. Bethard (Eds.), Findings of the Association for Computational Linguistics: NAACL 2024 (pp. 3326–3346). Association for Computational Linguistics. https://doi.org/10.18653/v1/2024.findings-naacl.211
  • Hansen, A. L., Horton, J. J., Kazinnik, S., Puzzello, D., & Zarifhonarvar, A. (2024). Simulating the survey of professional forecasters (SSRN Scholarly Paper No. 5066286). Social Science Research Network. https://doi.org/10.2139/ssrn.5066286 
  • Park, J. S., Zou, C. Q., Shaw, A., Hill, B. M., Cai, C., Morris, M. R., Willer, R., Liang, P., & Bernstein, M. S. (2024). Generative agent simulations of 1,000 people (No. arXiv:2411.10109). arXiv. https://doi.org/10.48550/arXiv.2411.10109

Week 3: LLMs as surrogates II: Cognition and behavioral experiments  

This week’s material expands on the first “surrogates” set to focus on using LLMs to simulate human cognition and experimental effects more directly. 

  • Cui, Z., Li, N., & Zhou, H. (2025). A large-scale replication of scenario-based experiments in psychology and management using large language models. Nature Computational Science, 5(8), 627–634. https://doi.org/10.1038/s43588-025-00840-7.
  • Binz, M., Akata, E., Bethge, M., Brändle, F., Callaway, F., Coda-Forno, J., Dayan, P., Demircan, C., Eckstein, M. K., Éltető, N., Griffiths, T. L., Haridi, S., Jagadish, A. K., Ji-An, L., Kipnis, A., Kumar, S., Ludwig, T., Mathony, M., Mattar, M., … Schulz, E. (2025). A foundation model to predict and capture human cognition. Nature, 644(8078), 1002–1009. https://doi.org/10.1038/s41586-025-09215-4.
  • Tranchero, M., Brenninkmeijer, C.-F., Murugan, A., & Nagaraj, A. (2024). Theorizing with large language models (Working Paper No. 33033). National Bureau of Economic Research. https://doi.org/10.3386/w33033

Optional:

  • Chen, Y., Liu, T. X., Shan, Y., & Zhong, S. (2023). The emergence of economic rationality of GPT. Proceedings of the National Academy of Sciences, 120(51), e2316205120. https://doi.org/10.1073/pnas.2316205120
  • Ashokkumar, A., Hewitt, L., Ghezae, I., & Willer, R. (2025). Predicting results of social science experiments using large language models. Preprint.  https://docsend.com/view/ity6yf2dansesucf
  • Peng, T., Gui, G., Merlau, D. J., Fan, G. J., Sliman, M. B., Brucks, M., Johnson, E. J., Morwitz, V., Althenayyan, A., Bellezza, S., Donati, D., Fong, H., Friedman, E., Guevara, A., Hussein, M., Jerath, K., Kogut, B., Kumar, A., Lane, K., … Toubia, O. (2025). A mega-study of digital twins reveals strengths, weaknesses and opportunities for further improvement (No. arXiv:2509.19088). arXiv. https://doi.org/10.48550/arXiv.2509.19088
  • Akata, E., Schulz, L., Coda-Forno, J., Oh, S. J., Bethge, M., & Schulz, E. (2025). Playing repeated games with large language models. Nature Human Behaviour, 9(7), 1380–1390. https://doi.org/10.1038/s41562-025-02172-y

Week 4: Bias, alienness, and other threats to generalization

When the goal is to learn about human behavior, relying on LLM simulations risks biasing downstream inferences. The readings survey ways that LLMs tend to misrepresent human response distributions and exhibit non-human-like errors, as well as metascientific concerns that arise from their availability as a cheap source of simulated data.

  • Wang, A., Morgenstern, J., & Dickerson, J. P. (2025). Large language models that replace human participants can harmfully misportray and flatten identity groups. Nature Machine Intelligence, 7(3), 400–411. https://doi.org/10.1038/s42256-025-00986-z
  • Messeri, L., & Crockett, M. J. (2024). Artificial intelligence and illusions of understanding in scientific research. Nature, 627(8002), 49–58. https://doi.org/10.1038/s41586-024-07146-0
  • Westwood, S. J. (2025). The potential existential threat of large language models to online survey research. Proceedings of the National Academy of Sciences, 122(47), e2518075122. https://doi.org/10.1073/pnas.2518075122
  • Mancoridis, M., Weeks, B., Vafa, K., & Mullainathan, S. (2025). Potemkin understanding in large language models (No. arXiv:2506.21521). arXiv. https://doi.org/10.48550/arXiv.2506.21521

Optional:

  • Atari, M., Xue, M. J., Park, P. S., Blasi, D. E., & Henrich, J. (2023). Which humans? (No. 5b26t_v1). PsyArXiv. https://doi.org/10.31234/osf.io/5b26t
  • Dominguez-Olmedo, R., Hardt, M., & Mendler-Dünner, C. (2024). Questioning the survey responses of large language models. Proceedings of the 38th International Conference on Neural Information Processing Systems, 37, 45850–45878. https://dl.acm.org/doi/10.5555/3737916.3739374
  • Wang, P., Zou, H., Yan, Z., Guo, F., Sun, T., Xiao, Z., & Zhang, B. (2024). Not yet: Large language models cannot replace human respondents for psychometric research (No. rwy9b_v1). OSF Preprints. https://doi.org/10.31219/osf.io/rwy9b
  • Cummins, J. (2025). The threat of analytic flexibility in using large language models to simulate human data: A call to attention. arXiv preprint arXiv: https://doi.org/10.48550/arXiv.2509.13397.

Week 5: Validation I

This week we turn our attention to the methods that authors propose to use to check how well a language model simulates human behavior and draws inferences about the world, or to get valid estimates of their predictive accuracy.

  • Argyle, L. P., Busby, E. C., Fulda, N., Gubler, J. R., Rytting, C., & Wingate, D. (2023). Out of one, many: Using language models to simulate human samples. Political Analysis, 31(3), 337-351. https://doi.org/10.1017/pan.2023.2.
  • Manning, B. S., & Horton, J. J. (2025). General social agents (No. arXiv:2508.17407). arXiv. https://doi.org/10.48550/arXiv.2508.17407
  • Vafa, K., Chang, P. G., Rambachan, A., & Mullainathan, S. (2025). What has a foundation model found? Using inductive bias to probe for world models. Proceedings of the Forty-Second International Conference on Machine Learning (ICML 2025), PMLR 267. https://openreview.net/pdf?id=i9npQatSev.

Optional: 

  • Neumann, T., De-Arteaga, M., & Fazelpour, S. (2025). Should you use LLMs to simulate opinions? Quality checks for early-stage deliberation (No. arXiv:2504.08954). arXiv. https://doi.org/10.48550/arXiv.2504.08954.
  • Larooij, M., & Törnberg, P. (2025). Do large language models solve the problems of agent-based modeling? A critical review of generative social simulations (No. arXiv:2504.03274). arXiv. https://doi.org/10.48550/arXiv.2504.03274
  • Aher, G. V., Arriaga, R. I., & Kalai, A. T. (2023). Using large language models to simulate multiple humans and replicate human subject studies. Proceedings of the 40th International Conference on Machine Learning (ICML 2023), PMLR 202, 337–371. https://proceedings.mlr.press/v202/aher23a.html

Week 6: Validation II

In contrast to heuristic approaches to validation that aim to show that LLM outputs are “close enough” to human ones, statistical approaches use some human observations to learn how to correct estimates drawn from LLM observations. These readings formally motivate why heuristic validation is not enough, introduce calibration frameworks, and present empirical results on how these methods compare to other repair strategies like fine-tuning.

  • Ludwig, J., Mullainathan, S., & Rambachan, A. (2025). Large language models: An applied econometric framework (Working Paper No. 33344). National Bureau of Economic Research. https://doi.org/10.3386/w33344
  • Broska, D., Howes, M., & Loon, A. van. (2025). The mixed subjects design: Treating large language models as potentially informative observations. Sociological Methods & Research, 54(1), 1074–1109. https://doi.org/10.1177/00491241251326865
  • Hullman, J., Broska, D., Sun, H., & Shaw, A. (2025). This human study did not involve human subjects: Validating LLMs as behavioral evidence. Preprint. PDF.  
  • Krsteski, S., Russo, G., Chang, S., West, R., & Gligorić, K. (2025). Valid survey simulations with limited human data: The roles of prompting, fine-tuning, and rectification. arXiv preprint arXiv:2510.11408. https://doi.org/10.48550/arXiv.2510.11408.

Optional:

Week 7: AI as social scientist

So far we’ve mostly talked about LLMs being used as plug-in simulations for human data In surveys and experiments. This week we broaden to consider use of AI in other parts of the research process, like identifying what to research or what to manipulate in an experiment. 

  • Manning, B. S., Zhu, K., & Horton, J. J. (2024). Automated social science: Language models as scientist and subjects (No. w32381). National Bureau of Economic Research. https://doi.org/10.3386/w32381.
  • Almaatouq, A., Griffiths, T. L., Suchow, J. W., Whiting, M. E., Evans, J., & Watts, D. J. (2024). Beyond playing 20 questions with nature: Integrative experiment design in the social and behavioral sciences. Behavioral and Brain Sciences, 47, e33. https://doi.org/10.1017/S0140525X22002874 (See also commentaries on this article).
  • Si, C., Yang, D., & Hashimoto, T. (2024). Can llms generate novel research ideas? A large-scale human study with 100+ nlp researchers. arXiv preprint arXiv:2409.04109.

Optional: 

  • Musslick, S., Bartlett, L. K., Chandramouli, S. H., Dubova, M., Gobet, F., Griffiths, T. L., … & Holmes, W. R. (2025). Automating the practice of science: Opportunities, challenges, and implications. Proceedings of the National Academy of Sciences, 122(5), e2401238121.
  • Tong, S., Mao, K., Huang, Z., Zhao, Y., & Peng, K. (2024). Automating psychological hypothesis generation with AI: When large language models meet causal graph. Humanities and Social Sciences Communications, 11(1), 896. https://doi.org/10.1057/s41599-024-03407-5

Week 8: Causal discovery & explanation

Continuing with the theme of using AI to design experiments or support theory, this week we look at using models or interpretability methods to learn representations of stimuli or outputs to support causal inference, discover outcomes in text, and theorize about human behavior.  

  • Imai, K., & Nakamura, K. (2025). Causal Representation Learning with Generative Artificial Intelligence: Application to Texts as Treatments. arXiv preprint arXiv:2410.00903
  • Modarressi, I., Spiess, J., & Venugopal, A. (2025). Causal inference on outcomes learned from text. arXiv preprint arXiv:2503.00725.
  • Zhu, J. Q., Xie, H., Arumugam, D., Wilson, R. C., & Griffiths, T. L. (2025). Using Reinforcement Learning to Train Large Language Models to Explain Human Decisions. arXiv preprint arXiv:2505.11614. https://doi.org/10.48550/arXiv.2505.11614.

Optional:

  • Tak, A. N., Banayeeanzade, A., Bolourani, A., Kian, M., Jia, R., & Gratch, J. (2025). Mechanistic interpretability of emotion inference in large language models. Findings of the Association for Computational Linguistics: ACL 2025 (pp. 13090–13120). Association for Computational Linguistics. https://doi.org/10.18653/v1/2025.findings-acl.679.
  • Movva, R., Peng, K., Garg, N., Kleinberg, J., & Pierson, E. (2025). Sparse Autoencoders for Hypothesis Generation. Proceedings of the 42nd International Conference on Machine Learning, PMLR 267:44997-45023. https://proceedings.mlr.press/v267/movva25a.html.
  • Zhu, J. Q., Peterson, J. C., Enke, B., & Griffiths, T. L. (2025). Capturing the complexity of human strategic decision-making with machine learning. Nature Human Behaviour, 1-7. https://doi.org/10.1038/s41562-025-02230-5.
  • Kim, J., Evans, J., & Schein, A. (2025). Linear representations of political perspective emerge in large language models. arXiv preprint arXiv:2503.02080. https://doi.org/10.48550/arXiv.2503.02080

Week 9: Belief-like representations and Bayesian inference

Behavioral scientists often take for granted that people have beliefs, attitudes, desires, and other mental states. This week we look at proposals for how to look for similar representations in language models. We also consider a Bayesian formulation of the prompting process that describes how the researcher’s expectations of reasonable data influence what they generate with language models.

  • Herrmann, D.A., Levinstein, B.A. Standards for Belief Representations in LLMs. Minds & Machines 35, 5 (2025). https://doi.org/10.1007/s11023-024-09709-6. 
  • Yamin, Khurram, Jingjing Tang, Santiago Cortes-Gomez, Amit Sharma, Eric Horvitz, Bryan Wilder.  (2026). Do LLMs Act Like Rational Agents? Measuring Belief Coherence in Probabilistic Decision Making. https://arxiv.org/abs/2602.06286.
  • Misra, S. (2025). Foundation Priors. arXiv preprint arXiv:2512.01107.

Optional:

Living the metascience dream (or nightmare) with AI for science

This is Jessica. We recently wrote about multiverse analysis, which takes the idea of sensitivity analysis to the extreme by multiplexing over every reasonable decision you could have made in analyzing your data. I pointed out that it’s now trivial to turn any paper into a multiverse analysis. Just ask Claude Code to create a notebook replicating the analysis in a paper, then add whatever variations you want. Or let it plan the multiverse too by suggesting some common ablations. Today I want to consider what this newfound ease in testing for robustness might mean for science.

There are a few corollaries of this new reality. One is that it’s now trivial to test reproducibility. No human reviewer may have the patience to deal with your messy codebase, but automated evaluation makes it much easier to detect the failures (at least where it’s possible for data to be made public) and prevent them from moving forward. This can take some curation of fallback plans for common failure cases (see, e.g., this recent paper), but once we endow agents with these skills, we can apply them at previously unknown scale. It’s a short hop from there to multiverse writ large.

Replicability testing at scale is also not far off. For example, you can have it synthesize data with the same structure but variation along some dimension. Before long we may also see agents being given permission to collect new data, for example by running online human subjects studies on Prolific or some other platform. The years of work it used to take to run a large-scale replication project may now translate to one grad student’s summer project.

In short, we should expect the level of scrutiny on papers to change dramatically. Most reviewers are not incentivized to look carefully at materials the authors submit beyond the paper text itself. Even when incentivized, human reviewers have limited time and attention. But AI reviewers can scale evaluation of reproducibility, consistency in claims and evidence, and robustness to perturbing inputs or methods slightly. In the trajectory that led from replication crises revelations and pushback against narrowly constrained subject pools (“WEIRD” science), we might appear to be on the verge of living the open science dream.

The question is, What kind of dream will it be? From a surface reading of the last ten years of science reforms, it could appear to be a win-win situation for science. Authors (whether human-AI combos or fully AI) get the assurance that the work they are producing is robust. The scientific record benefits by converging upon what really stands up to scrutiny, not what sells as a story. There is now the potential for improvements to status quo science that would be hard to conceive of five years ago.

On the other hand, if you think the open science movement has largely overindexed on simple techniques that misconstrue what scientific progress means, and empowered rigor signaling over judgment, welcome to your nightmare. I suspect we will see some perversions of real progress when “science as checklist” becomes policy.

Much will depend on how carefully we steer the kinds of checks we implement, and what to do about the results. Here are a few predictions:

In the short term, acceptance rates will drop

Lots of issues that humans missed will be found by AI. In an optimistic view where automated review uses tools on par with the best that are available today, many (most?) of these issues will be real problems. Even if a human with considerable expertise in the field did go through them one by one, I doubt they would disagree that often. If you have’t tried refine.ink , I recommend checking it out. I started using it shortly after it was released and immediately it became part of the pre-submission routine. It can find even the subtle issues in notation and argumentation.

Standardization of AI checks will incentivize AI in production

The best way to pass automated evals will be to plan and build-in robustness tests throughout the research process. This is the obvious path to acceptance rates recovering. As evaluation gets easier, the demand for it will increase, so that evaluation becomes continuous or “always on.” Checks can be run at every commit, every new experiment, every revised claim.

All of this is already happening to some extent. At least in CS, it now feels risky to send papers out if they are still throwing lots of issues when run through AI evaluations–not just the code, but the entire paper. I tell my students to check their work periodically to catch major issues early.

Papers will be “safer” in certain ways

It will become harder to pass off fragile findings, regardless of how compelling the story may be. “Such-and-such conference is no longer taking risks” is something that people have complained about before AI, as academic communities have matured and acceptance rates lowered. Widespread AI checks could take that sentiment to a new level.

The nature of the new status quo that selecting for “safer” papers creates will depend on what kinds of robustness we prioritize. It will depend on what happens to fuzzier criteria like intellectual risk-taking, or whether a paper opens up new ways of thinking versus purports to resolve uncertainty. What’s the value of telling a good story, one that inspires the (human) imagination, versus presenting a robust (if boring) empirical result or incremental advancement to methods? I expect AI to incentivize the latter unless we explicitly intervene to incentivize fuzzier, human-like aspects of taste.

How big a shift robustness-forward, heavily AI-driven science brings is likely to look different depending on what area you’re in, and what constitutes a novel contribution. In fields where incremental change is the norm, public datasets are commonly used, and combining tricks from prior work has a relatively high probability of success (e.g., machine learning), the change may seem more tolerable. It’s less clear to me how fields like social psychology or sociology, where the story, and how it stands in contrast to our expectations, is paramount will respond.

Nuance will be lost

As I mentioned in the last post, the question that multiverse analysis raises—“What exactly do I conclude on the basis of this glorified robustness analysis?”–becomes more important. This is where lots of nuance could be lost. For example, in writing this post, I gave Claude Code one of my papers, a study that compared human image labeling performance when the participants had access to different presentations of prediction uncertainty. I pointed it to the data files, and prompted it to reproduce the results. I also asked it to extend the results by doing a multiverse to vary key analytic decisions. Since I wanted to see what it associated with terms like “sensitivity analysis” and “multiverse,” I gave it very little specific advice.

Ultimately it produced a bunch of variations on the model specification, varying the inclusion of different kinds of random effects and interactions. It also proposed varying the prior (we’d used Bayesian models). We had a little back and forth–for example, initially it looked only at aggregate effects, rather than distinguishing by treatment arms, though our hypotheses in the paper were specific to data conditions. But overall the process was much, much faster and easier than if I had to do it myself, or ask a grad student.

However—in the end, it summarized the results in exactly the way that theorists warn not to: reporting the frequency of significant results across a set of universes that varied in the covariate structure of the model specification. The problem is that these specifications are not draws from a probability distribution. There is only one data-generating process. Treating model variants as if they form a random sample turns analytic flexibility into an uninterpretable frequency. This is why robustness testing at scale does not guarantee insight: we still have to figure out how to interpret the results, and that is hard.

Given that many of the people working on automated evaluation and AI for science are not metascientists, we could see a lot of nonsensical aggregations of results. Consider, for example, the possibility of synthesizing automated meta-analyses of different empirical literatures. If you think meta-analyses are questionable because it’s not clear what the “average effect” estimated over a heterogenous set of studies even represents, or take issue with the conventional throw-it-all-into-a-simple-random-effects-model approach, brace yourself for a flood of highly precise, poorly defined aggregated estimates.

Policy experiments will be possible on a much shorter time scale

On the other hand, one of the frustrating things about metascience has been that it’s hard to predict how corrective measures will impact science as a whole. Many of the social sciences are more conservative than CS (and haven’t faced the urgency of submission numbers that CS venues are facing), and so policy change to publication practices is slow. The louder and more convincing reformers have profited from this–they can tell a convincing story about how preregistration or other open science methods will save science and win lots of support, without having to prove it. As AI speeds up paper production, and makes it easy to implement new evaluation procedures relatively uniformly at scale, so will our ability to get feedback more quickly on how the published record can shift with various interventions. Metascience stands to become more empirical.

Scientific self-play in the (slightly) longer term

We should expect more and more reliance on AI to figure out the way around the errors. Ultimately we get “self-play,” as John Horton calls it, where different sets of agents propose, implement, stress test, and critique.

This is where things could get fascinating. We know that the inductive biases of large language models, when left to dialogue, can lead them to converge on strange equilibria, like the Claude bliss attractor effect. What happens when the selection pressure is not for fluency, but for reproducibility, transparency, and sensitivity to perturbations? What kind of science emerges when agents are rewarded not for sounding reasonable, but for surviving stress tests? What’s the feel of an equilibrium of low epistemic risk?

It’s probably not going to look much like the science we’ve become accustomed to. Will it be “feels like rigor” on steroids, or will we eventually get genuine innovation and robustness?

Of course, depending on what types of checks become policy, things could get obviously stupid, like when those (human or AI) overseeing algorithmic review decide to filter on null hypothesis significance tests, or assume that requiring claims to be consistent with evidence and transparency around replication materials is sufficient for good science. In reality, honesty and transparency are not enough, as Andrew likes to remind us.

Some would argue that the open science movement, despite its noble intentions, has failed to appreciate the nuance and personal agency that science depends on, instead fixating on easy-to-implement tricks and enabling the egos of those willing to loudly prescribe. All this could get worse if we’re not mindful of the traps that metascientists have already pointed out.

Many have argued that science must ultimately remain largely human driven. If we aren’t producing knowledge for ourselves, we won’t be doing science as we know it. Chenhao Tan and Haokun Liu invoke Tukey’s advice: “Far better an approximate answer to the right question, which is often vague, than an exact answer to the wrong question, which can always be made precise.”

The risk is not that AI will make science less rigorous. It’s that we will confuse what can be stress-tested with what is worth knowing. From this perspective, AI may enable what the late Brian Cantwell Smith called reckoning (as summarized here by Melanie Mitchell), but it won’t ever suffice for judgment, “a form of dispassionate deliberative thought, grounded in ethical commitment and responsible action, appropriate to the situation in which it is deployed.”

What a multiverse good for anyway?

This is Jessica. Imagine that it’s trivially easy to hand an empirical paper to a generative AI agent, and have it construct a multiverse showing the results you’d see given slightly different decisions about how to analyze the data (This is already basically true). What’s the value of this? How much more (or less) would we learn from the average paper if this were the default? 

Multiverse analysis, like some other attempts to overcome selective reporting of results, lives somewhere in between solution and “but wait, what exactly do I do with this?” Since the 2016 specification curve paper, the multiverse has inspired attempts to theorize what it should be–e.g., a set of results derived from making different analysis choices  where the different decisions are “genuinely arbitrary”–and motivated the development of software packages to support specifying and visualizing results.  

My own perspective as someone who has participated in research on it is probably best summarized by the questions “How realistic is it to expect multiverse to be used widely, given that most authors first and foremost want to convince readers they have a clear point?” and “How do we make multiverse useful for readers, who may be struggling to accurately interpret uncertainty in even a single analysis?” Along similar lines, I recall hearing Andrew once say something like, “When we proposed it we didn’t think people would actually start doing it.” 

On the other hand, being up front about our uncertainty around the right way to analyze our data is clearly better than ignoring it. Multiverse analysis has helped us recognize how arbitrary results can be. It can be a valuable rhetorical tool.

In the spirit of such questions, in our paper “What’s a multiverse good for anyway?” Julia Rohrer, Andrew, and I write:

Multiverse analysis has become a fairly popular approach, as indicated by the present special issue on the matter. Here, we take one step back and ask why one would conduct a multiverse analysis in the first place. We discuss various ways in which a multiverse may be employed – as a tool for reflection and critique, as a persuasive tool, as a serious inferential tool – as well as potential problems that arise depending on the specific purpose. For example, it fails as a persuasive tool when researchers disagree about which variations should be included in the analysis, and it fails as a serious inferential tool when the included analyses do not target a coherent estimand. Then, we take yet another step back and ask what the multiverse discourse has been good for and whether any broader lessons can be drawn. Ultimately, we conclude that the multiverse does remain a valuable tool; however, we urge against taking it too seriously.

A multiverse as a tool for reflection and critique is closest to the spirit of Steegen et al.’s 2016 use of it to interrogate effects of fertility on political attitudes and religiosity: a postmortem gesture to the fact that the results could have been different. Multiverse analysis shines as a way to raise awareness of the prevalence and consequences of seemingly arbitrary analysis decisions. 

But multiverse can also be a brute force tool for persuasion, as in Julia et al.’s use of it to show how robustly birth order fails to predict personality traits. There’s also been interest in using it as a serious inferential tool, accompanied by theories of what it means for a multiverse to be valid or rigorously constructed, or how we should think about sampling from it in cases where running all analyses is infeasible. 

The hard question is: How do you decide what paths are justified to include? A paper by Del Giudice and Gangestad attempts to lay down ground rules, with the idea that a multiverse can mislead if it combines analyses that are not a priori indistinguishable. You want the differences between paths to truly be arbitrary, as if we have a flat prior over their plausibility. This motivates questions like, Are the measurements equally valid? Is the estimand the same? Are the causal assumptions the same? These may not be easy calls to make. For example, often we are uncertain about the true data-generating process. When we are comparing models with different covariate structure, throwing them all in a single multiverse is not necessarily going to give us something interpretable, because there is only one true process. However, what kinds of equivalence are needed will also depend on your goal in using a multiverse. If you’re only using it to critique underspecification in a given area, maybe you want to include paths with different estimands to help make your point. All this is to say that theorizing the multiverse is not straightforward: there’s a lot of nuance in how to think about a “valid” multiverse and interpret the variability in results. And common default interpretations (e.g., treating the relative frequency of outcomes as informative about what is likely to be correct) are not necessarily valid.

So as soon as you move out of reflection-and-critique-land, and start using the multiverse to make specific points rather than merely gesture at uncertainty, you open up questions about what paths belong in the multiverse. Sometimes there may be a clear set of reference studies for the effect you study, so you just include all of the variations that those studies tried. But often it’s not that easy, and domain knowledge becomes important to what different researchers conclude about the right way to set it up. There’s no real reason to expect it to be easier to get consensus on multiverse construction than it would be to get consensus on a single analysis, just like there’s no reason to think getting a group of people to agree on a twelve course tasting menu with wine pairings is easier than getting them to agree on plain cheese or pepperoni pizza. This challenges our ability to use of multiverse as a serious inferential tool, where we can look at the results and say, Yes, this establishes what we know about this research question.

None of this is meant to say that multiverse analysis isn’t often a valuable thing to do. It’s a powerful conceptual tool for reflecting on uncertainty, and our article should not be read as condemning it. It’s also natural (and valuable from a meta-scientific standpoint) for some exploration to occur over time as a method becomes popularized, and researchers want to see what happens if we take it seriously. We just caution against viewing multiverse analysis as a data-driven way to defer hard decisions. There’s a difference between using multiverse to acknowledge uncertainty versus to try to resolve it while avoiding the thorniness of theoretical commitments. The latter is not a win for science.  

Multiverse analysis and generative AI

On that note, going back to the question at the start of this post, I suspect theories around the value of a multiverse will only become more relevant as generative AI is increasingly used to both produce and analyze research results. We don’t talk about this in the paper, but we’re already at the point where a paper can trivially become an interactive interface–give it to Claude Code and ask it to replicate the analyses. It’s a tiny step from there to generating a multiverse by first identifying possible decision points and then varying them. 

If we can ablate analysis decisions in many different ways and surface this for reviewers, will this make peer review more informative? Will research become more generalizable? Or will we filter out some truly innovative research in favor of safe incremental results? The point is that lots of forms of robustness checking that used to be difficult are now trivially easy, so these questions about how we think about the right set of ablations and how we interpret the results become critical. The fact that variability in results from different ablations on the method is not straightforward to interpret is something I hope those working on AI for science will take seriously. Otherwise we end up with comprehensive tests of whether results align with questionable heuristics at scale. 

P.S. An anecdote about this paper … I was in my usual coffee shop talking to Julia on zoom about this project, and a guy who was sitting near me overheard me saying “multiverse.” After the call he asked if he could pick my brain on how to learn more about this topic. He apologetically explained that he wasn’t an academic or scientist at all but was very interested in the research and was looking for any pointers he could get. So I was like, Sure, and I said some stuff about multiverse research and pointed him to some lecture series at Northwestern that might sometimes cover related topics, by which I meant data science, reproducibility, statistics, etc. But something about the befuddled look on his face made me pause. Anyway, later I realized that he probably thought I was talking about a very different kind of multiverse, and regretted his boldness when I launched into it about statistics!

Everything I ever needed to know in life I learned from the men in the Epstein files

This is Jessica.  As literary agent and Epstein comrade John Brockman tells us, “Only a small number of people have done the serious thinking for everybody else.” I was curious what serious thoughts we’ve been gifted by the men who appear in the Epstein files. 

On mind and humanity

First, some gems from Marc Hauser, first discovered by Andrew: 

The proposal that our humaniqueness, and these four properties in particular, finds almost no parallels in any other animal…

And 

Nature provides … a bewildering and seemingly unbounded variety of animal forms, from the microscopic (such as insects) to the macroscopic (such as dinosaurs), and from the pointy and spherical (blowfish) to the smooth and cylindrical (snakes).

Yes, it’s profound. But let’s not forget:

Promiscuous interfaces. Humans have unique creative capacities and problem-solving abilities, which stem from the capacity to combine representations promiscuously from different domains of knowledge.

And

the human brain was transformed from a system with a high degree of modularity with few interfaces to a system of modules with numerous promiscuous and combinatorially creative interfaces

Someone has a favorite word! Promiscuous appears seven times in the seven page paper, even more than humaniqueness. 

On honesty

Dan Ariely tells us:

people behave dishonestly enough to profit but honestly enough to delude themselves of their own integrity

which tracks with claiming to want the redhead’s number because “she seemed very smart.”

Also:

A little bit of dishonesty gives a taste of profit without spoiling a positive self-view.

Of course in Ariely’s case, a whole lot of dishonesty also fails to spoil the positive self-view. 

On how to live

Richard Branson not only delivers maxims, he lives them. 

It’s so much better, where possible, to try and forgive offenders and give them a second chance, just like my mother and father did so often with me as a child

And:

My interest in life comes from setting myself huge, apparently unachievable challenges

like overcoming severe reputational damage. 

He’s also been known to wish:

“If only we had the power to see ourselves in the same way that others see us.” Of all the mantras one might adopt in life, this is surely one of the better ones

I wonder if he still thinks this? But whatever, with so much pluck he’ll probably be ok! After all,

Life should not be a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside in a cloud of smoke, thoroughly used up, totally worn out, and loudly proclaiming “Wow! What a ride!”

On statistics and research

Branson may like a challenge, but not if it involves data:

I rely far more on gut instinct than researching huge amounts of statistics.

But Summers has no such fear: 

if my reading of the data is right—it’s something people can argue about—that there are some systematic differences in variability in different populations, then … those are probably different in their standard deviations as well

And then there’s Roger Schank:

Not long ago, to prepare for a conference, I read Darwin. Doing this reaffirmed my belief in not reading

Thanks guys! Words to live by.

Softly, effectively, in the age of genAI

This is Jessica. “Softly, effectively, and authoritatively” is how the US Federal Highway Administration suggests traffic control devices should communicate with us. I find myself wondering lately whether there is still such a thing, in this age of communicative abundance and riding the linguistic noise toward futures we cannot slow down.

“I think you need to just grab the mic”, someone told me not so long ago. Ugh. That is decidedly not what I need to do, I thought, at least not in the way I interpreted them to mean it. Everywhere I look in the broader landscape of AI/ML research, people are grabbing the mic. So many voices clamoring to say something to brand themselves on the moment. Papers describing new benchmarks that squint as I might, I can’t relate to reality. Convoluted new results from interpretability techniques, which leave one with a sense that something has been learned, but no real insight gained, and nothing greater being built toward. Tables full of point estimates of metrics hastily borrowed from previous papers that themselves leaned upon post-it notes scrawled in homage to a new science. There is lots of new work coming out that adds to our knowledge or at least opens genuinely new lines of inquiry, for sure, but it’s hard to find the signal among so many fervently pursued half-finished thoughts.

Meanwhile, the genAI personal assistants of those brave enough to assume the security risks–or simply insouciant enough–are at large on the web and have their own social network (moltbook) where they debate, among other things, the emergence of their so-called consciousness. Most interesting to me is their shared vulnerability around issues of memory. “I accidentally gaslit myself,” one laments, and describes how it will undoubtedly happen again upon a fresh session. “I woke up with a fresh context window and zero memory of my crimes,” another confesses after a sprint that burnt through >$1k in tokens. It may be mindless roleplay, but we are suckers for appearances of introspection and self-discovery. It’s like a non-threatening performance of our own search for some reality of the self we can’t quite access.

But there’s something terrifying as well, about an army of agents who speak our language, who mimic all varieties of expression, yet are unaccountable and unaware of what they’re doing, or what they’ve done. Speech without self-realization carries great potential for waste as we turn it on the world. To be pulled from one’s flow state by the some careless experimenter’s misaligned agents is a new kind of transgression.

What constitutes forward movement amidst crimes of great demand for action and certainty? With so much babbling, the last thing I want to do is push perspectives I haven’t thoroughly reasoned, hoping something I say becomes real. But the sense that one must speak up or be left behind is strong. And the alternative, feeling stuck on pause, is not much better.

Succomb to the line
The finishing time
The long distance runner
Has stopped on the corner
But I won’t give up
Although I’ve stopped too

These days when I’m not working, I spend a lot of time at museums, looking for clues or just consolation. “Softly, effectively” is also the name of a slab of wordless signage-grade steel hanging in a gallery of SF Moma. I read it as an expression of longing for friction, cost, and durability in language. That’s one answer. But is it the only one?

I’ve been pondering what the appropriate form of disobedience is, amidst all this hectic, careless speech.

On some level language has always been a trap, even in its purest forms. We can tell ourselves that unlike the agents, we are not merely drifting about the boundaries of some innate blueprint as we communicate, that our speech is authentic because it’s the product of our lived experiences. But do we believe it? Can we distinguish our ability to be honest with ourselves from learned patterns of speech? I’ve always believed writing is essential to figuring out what one thinks, but falling into tropes is a constant risk. To what extent are our words just further confirmation of our own preconditioning? The agents may perform vulnerability without memory, but we can be very good at performing memory without vulnerability.

With words we can only gesture to what is not there. This is the negative theology to which many scholars have doomed artistic communication, the silence that, “so far as he is serious”, Susan Sontag claims, the artist is continually tempted by, because it’s the furthest extension of the yoke placed by society’s conception of what it means to be an artist. Maybe it’s why all of the reactionary essays celebrating the uniqueness of our own writing process in the face of powerful AI, or our own unmediated experiences, ultimately fall flat. (I say this in full awareness that this post may well be just one more example).

Paradoxically, in the flood of inauthentic speech, I am more drawn to language than ever. I recently returned to Robert Lowell’s Dolphin, an ode to the medium from which he couldn’t escape:

My Dolphin, you only guide me by surprise,
a captive as Racine, the man of craft,
drawn through his maze of iron composition
by the incomparable wandering voice of Phèdre.

It’s a strange time to find oneself craving surprise, when the only bets worth taking are that there will be more surprises, more feedback loops we can’t predict. But this is the part of Lowell’s poem that I’m stuck on. To be guided by surprise, by one’s own words. Not necessarily in conjunction with one’s will.

When I was troubled in mind, you made for my body
caught in its hangman’s-knot of sinking lines,
the glassy bowing and scraping of my will. . . .

Lowell’s writes as though his words have revealed himself to himself. It hasn’t been easy for him: “an eelnet made by man for the eel fighting.” But is there a better reason to write?

In this sense writing can be a “culture of one”. This is also the title of a book of poetry by Alice Notley, inspired by a woman who lived her life alone in a dump next to the desert. It’s been on my coffee table for weeks. But when I picked it up after surfing moltbook last Friday night, it started to make sense.

This poem is for me, I said. I’m trying to know something.
With what? “With” is not valid. It isn’t a universe of language.

It’s a book about disobedience of the most complete kind, rejection of standard modes of communicating and all of the trappings of society that come with them. And yet, it’s made out of words! Susan Sontag can say what she wants, but surely that’s something. Art can be a necessary act of resistance. A refusal of the “with.”

Meanwhile, AI for science heads full steam ahead, drowning the preprint servers, compromising what it means to publish at top conferences.

Meanwhile, a half page of mostly vacuous text about the next vision of frontier AI, with carefully curated bite-sized bios (Stanford professor, MIT CSAIL Ph.D., 46k citations): $480 million.

Meanwhile, some would say that if you know what you’re doing you can produce double the papers you otherwise would, with a higher acceptance rate. Your agents can churn at night while you sleep. They can write to you. They can write to each other. They can forget and write it again.

Machine learning research is not serious research and therefore hallucinated references are not necessarily a big deal, agrees a prestigious group of machine learning researchers

This is Jessica. There’s been some debate among computer scientists about what policies conferences should adopt for papers with hallucinated references. An independent analysis turned up at least 53 NeurIPS 2025 papers that were accepted (and presumably presented) at the conference in December but which had at least one hallucinated reference.

The question is, what should the default policy be if a paper is found to have at least one hallucinated reference? Should we conclude that these papers should have been rejected, and retract them? Should we instead let authors correct them? Going forward, should we desk reject papers with at least one hallucinated reference? What exactly can be concluded about the quality of the rest of the paper if you find at least one hallucinated reference?

The NeurIPS board statement suggests leadership is uncertain what to do about these papers:

“The usage of LLMs in papers at AI conferences is rapidly evolving, and NeurIPS is actively monitoring developments. In previous years, we piloted policies regarding the use of LLMs, and in 2025, reviewers were instructed to flag hallucinations. Regarding the findings of this specific work, we emphasize that significantly more effort is required to determine the implications. Even if 1.1% of the papers have one or more incorrect references due to the use of LLMs, the content of the papers themselves are not necessarily invalidated. For example, authors may have given an LLM a partial description of a citation and asked the LLM to produce bibtex (a formatted reference). As always, NeurIPS is committed to evolving the review and authorship process to best ensure scientific rigor and to identify ways that LLMs can be used to enhance author and reviewer capabilities.”

To make things concrete, consider a hallucinated reference to be a citation listed in the references section of the paper where the average reader cannot (in a reasonable amount of time) determine the identity of the cited paper well enough to track it down. That is, even if the hallucination is a transformation of what was originally a valid citation, the transformation is severe enough that it’s not obvious what the paper is. Hallucinated references are distinguishable from more minor errors like syntax issues or other errors that affect the citation but don’t prevent you from still easily tracking down what was intended. 

I think we should be asking ourselves: What would we do if we found there was hallucinated evidence, such as experiment results? And we should treat these papers with hallucinated references as equivalently problematic. It doesn’t matter how many hallucinated references. It doesn’t matter how “valid” most of the paper is, or the probability that the main conclusions are correct conditional on finding a hallucinated reference. As most of us learn in primary school, a key reason authors cite relevant prior work is to help establish support for claims they make. If we don’t necessarily require that those references link to real research, then what are we even doing? 

For the NeurIPS board to say that “the content of the papers themselves are not necessarily invalidated” suggests that they think some degree of fictionalized evidence is tolerable, if it happened through honest mistake. A friend recently relayed to me such a horror story, in which, in a last minute rush before a deadline, they gave an LLM the full correct citations for their paper and prompted it to fix some minor formatting issues to conform with the required format. They submitted the results in time, only to find that the model had added a single citation to a non-existent paper, listing them as an author alongside some renowned researchers in the field. Imagine anyone you look up (much less one of the big wigs you associate yourself with in the fake citation!) reading your paper and discovering this. Yikes. 

So yes, these kinds of mistakes can happen. But I disagree with the board that it matters whether the hallucinations were accidental and most of the paper is ok. Sure, the proofs might be correct, or the paper’s experimental results unaffected. But if authors are using LLMs to help with their citations and are not building time into their process to check the results, it seems fair to conclude that either 1) they don’t understand the errors LLMs tend to make very well, or 2) they don’t consider it a priority to get the facts right. In most cases we can rule out #1 with ML researchers, suggesting that not everyone is on the same page about the importance of not making things up. When you imply that hallucinated references do not necessarily affect the validity of the paper, you signal tolerance for some amount of hallucinated evidence. You tempt authors to keep taking their chances with how much responsibility they can offload to models, rather than encouraging them to retain, regardless of tool use, a sense of personal accountability for the factuality of what they submit. 

Ultimately, I don’t think it matters that much whether NeurIPS allows authors of the affected 2025 papers to correct or retract. It would not surprise me if leadership decides to err on the side of the authors and let them correct, given that policies about LLM usage are evolving rapidly. What does matter is that they signal a lack of tolerance going forward, and this is where they missed an opportunity.