ClaimsPeople

Steven Pinker

Steven Pinker is listed by Harvard as the Johnstone Family Professor of Psychology, and he is the author of widely read books including The Language Instinct, The Better Angels of Our Nature and Enlightenment Now.

879 claims collected, 167 researched, 99 resolved. Report of 5 November 2026, method 0.1.0+28da144b.

Scores by kind of claim

Each kind of claim is scored on its own, out of 100: the share that held up, with the range it likely falls in. Fewer resolved claims give a wider range.

  • Factual claims

    Statements about the present or the past, checked against the record: did they hold up?

    74 68 79

    High confidence, 97 factual claims resolved. From 19 documents, 2002 to 2026; 19 documents sampled from 36 candidates found.

    Not scored: 49 unresolvable, 2 checkable only against their own records.

    See the factual claims

  • Predictions

    Statements about events outside the person's control, checked once they fell due: did they come true?

    Insufficient record: 1 prediction resolved, 5 needed for a score.

    Not scored: 12 unresolvable. 2 more fall due later.

    Does not yet allow for how likely each prediction was when made.

    See the predictions

  • Promises

    Commitments to the person's or organisation's own future action, with something to deliver: was it delivered?

    Insufficient record: 1 promise resolved, 5 needed for a score.

    Not scored: 2 unresolvable.

    See the promises

All types combined: 74 (likely 68 to 79, high confidence), from 97 claims: 97 factual claims. It mixes kinds of claim in different proportions for different people, so compare people kind by kind.

Steven Pinker's claims

54 claims

54 claims, sorted by newest said. Choose a claim to read it in full.
VerdictKindSaidClaimTopic
Mostly true Factual 11 Oct 2026 It has been known for decades in the study of language that people do not blurt out what they mean but use euphemism, innuendo and indirection. Factual · 11 Oct 2026 AI capabilities
Mostly true Factual 11 Oct 2026 Progress against homicide has definitely continued, with homicide rates for most countries and for the world as a whole better now than 15 years ago. Factual · 11 Oct 2026 Philosophy, ethics and society
Mostly true Factual 11 Oct 2026 Pinker said he floats a number of hypotheses as to why cooperation and human flourishing in general have increased. Factual · 11 Oct 2026 Philosophy, ethics and society
Mostly true Factual 11 Oct 2026 Slavery and imperialism were as old as civilisation, predating the Enlightenment. Factual · 11 Oct 2026 Philosophy, ethics and society
Mostly true Factual 7 Oct 2026 Pinker cited a prediction by someone like Paul Krugman, the New York Times economics op-ed columnist, that the internet was a big nothingburger and would fizzle. Factual · 7 Oct 2026 Technology
Mostly true Factual 7 Oct 2026 Studies of human persuadability and malleability show substantial unpredictability and chaos in human responses. Factual · 7 Oct 2026 Science and research methods
Mostly true Factual 7 Oct 2026 Computers have always been better than humans at some tasks, which is why they were adopted from the 1950s for databases and calculation. Factual · 7 Oct 2026 AI capabilities
Mostly true Factual 26 Sep 2026 Pinker said he had argued that any intelligent system is a mechanism good at solving some problems but not others, and that it is inherently limited by knowledge about the world attainable only through observation and experimentation. Factual · 26 Sep 2026 AI safety and alignment
Mostly true Factual 26 Sep 2026 The capabilities of LLMs trained on huge datasets are more general than Pinker and almost everyone else would have guessed at the time he laid out his arguments, five years before LLM chatbots were released. Factual · 26 Sep 2026 AI capabilities
Mostly true Factual 24 Sep 2025 Harvard does not admit students on meritocratic grounds. Factual · 24 Sep 2025 Philosophy, ethics and society
Mostly true Factual 24 Sep 2025 Some marine species, such as broadcast spawners, coordinate the release of gametes on the full moon or a fixed number of days after it. Factual · 24 Sep 2025 Science and research methods
Mostly true Factual 24 Sep 2025 Human sacrifice, once practised by all ancient civilizations, no longer exists today. Factual · 24 Sep 2025 Philosophy, ethics and society
Mostly true Factual 24 Sep 2025 Large language models have features, such as hidden layers, that implicitly build in some insights of linguistics. Factual · 24 Sep 2025 AI capabilities
Mostly true Factual 24 Sep 2025 Slavery exists only clandestinely today; no country has legal slavery anymore. Factual · 24 Sep 2025 Philosophy, ethics and society
Mostly true Factual 24 Sep 2025 Asked whether Taiwan is a sovereign state, Pinker said the official policy of the United States, and as far as he knows of pretty much every other country, is that Taiwan as a sovereign state does not exist. Factual · 24 Sep 2025 AI policy and governance
Mostly true Factual 24 Sep 2025 There are not more slaves in the world today than in the past as a proportion of the world's population. Factual · 24 Sep 2025 Philosophy, ethics and society
Mostly true Factual 13 Jun 2024 Racial and ethnic minorities in the US have had large gains in health care coverage. Factual · 13 Jun 2024 Other
Mostly true Factual 2023 Pinker was among those who argued that predicting the next word is not how language works. Factual · 2023 Their own work or organisation
Mostly true Factual 2023 Large language models' intelligence almost certainly does not work the same way as human intelligence. Factual · 2023 AI capabilities
Mostly true Factual 2023 Current large language models are trained on a fixed dataset frozen as of 2021 and have no knowledge of events after 2021. Factual · 2023 AI capabilities
Mostly true Factual 27 Dec 2022 A new big-data study by a team including Simon Baron-Cohen found females on average outperform males on a 'theory of mind' test across 57 countries. Factual · 27 Dec 2022 Science and research methods
Mostly true Factual 21 Dec 2022 Stanford's new 'Harmful Language' guide flags as ableist language that trivializes the experiences of people living with mental health conditions. Factual · 21 Dec 2022 Philosophy, ethics and society
Mostly true Factual 23 Dec 2019 Public health research and evidence-based harm reduction policies save tens of thousands of lives every year. Factual · 23 Dec 2019 Other
Mostly true Factual 9 Oct 2018 Religious people organize and vote, giving them electoral clout out of proportion to their numbers. Factual · 9 Oct 2018 Philosophy, ethics and society
Mostly true Factual 9 Oct 2018 Ronald Reagan was highly successful politically with a message of optimism. Factual · 9 Oct 2018 Their own work or organisation
Mostly true Factual 9 Oct 2018 People worldwide are becoming less religious in general, but religious people have more children. Factual · 9 Oct 2018 Philosophy, ethics and society
Mostly true Factual 22 Mar 2018 Enlightenment thinkers did not know evolution or thermodynamics. Factual · 22 Mar 2018 Philosophy, ethics and society
Mostly true Factual 22 Mar 2018 Intelligence is in good part heritable. Factual · 22 Mar 2018 Science and research methods
Mostly true Factual 22 Mar 2018 For most of human history, life expectancy was about 30 years. Factual · 22 Mar 2018 Other
Mostly true Factual 22 Mar 2018 Studies show that when data concern a political hot-button issue such as concealed weapon laws, people systematically misread it in the direction favoring their coalition's position. Factual · 22 Mar 2018 Philosophy, ethics and society
Mostly true Factual 13 Feb 2018 Murder rates in the Middle Ages were about 35 times higher than they are today. Factual · 13 Feb 2018 Philosophy, ethics and society
Mostly true Factual 13 Feb 2018 Many data sets show that rates of violence have gone down over the course of history. Factual · 13 Feb 2018 Philosophy, ethics and society
Mostly true Factual 13 Feb 2018 Many religions today accommodate themselves to scientific knowledge, including the Copernican view and the theory of evolution. Factual · 13 Feb 2018 Philosophy, ethics and society
Mostly true Factual 12 Mar 2013 Human intelligence is not particularly dependent on geography. Factual · 12 Mar 2013 Science and research methods
Mostly true Factual 12 Mar 2013 There is no good evidence that violent video games cause real-life violence. Factual · 12 Mar 2013 Philosophy, ethics and society
Mostly true Factual 12 Mar 2013 Pinker said his claim was not about hunter-gatherer societies specifically, but about traditional societies living in a state of anarchy, not under the control of a centralized state. Factual · 12 Mar 2013 Science and research methods
Mostly true Factual 12 Mar 2013 Whatever gender differences exist in abilities are statistical and small and say nothing about any individual. Factual · 12 Mar 2013 Philosophy, ethics and society
Mostly true Factual 12 Mar 2013 Rates of violence respond to certain features of the environment, such as the incentives of an effective police and criminal justice system and the surrounding norms of legitimate retaliation, but not to video games. Factual · 12 Mar 2013 Philosophy, ethics and society
Mostly true Factual 1 Nov 2012 Rates of violence have not fallen to zero, so there is always enough violence to fill the news, making subjective impressions diverge from statistics. Factual · 1 Nov 2012 Science and research methods
Mostly true Factual 1 Nov 2012 Since 1945 big, rich, developed countries have not waged war on each other. Factual · 1 Nov 2012 Philosophy, ethics and society
Mostly true Factual 1 Nov 2012 The European wars of religion were proportionately as destructive as, probably more destructive than, World War I. Factual · 1 Nov 2012 Philosophy, ethics and society
Mostly true Factual 1 Nov 2012 The increase in affluence came in the nineteenth century with the Industrial Revolution. Factual · 1 Nov 2012 Economics and markets
Mostly true Factual 18 Jun 2012 The first complex states depended on brutal coercion rather than spontaneous cooperation. Factual · 18 Jun 2012 Philosophy, ethics and society
Mostly true Factual 18 Jun 2012 Individual bodies are not passed down through generations the way genes are. Factual · 18 Jun 2012 Science and research methods
Mostly true Factual 10 Nov 2011 Great powers and developed countries have stopped going to war, and worldwide deaths in warfare may be at an all-time low. Factual · 10 Nov 2011 Philosophy, ethics and society
Mostly true Factual 6 Oct 2011 The Old Testament is filled with genocides commanded by God, the lives of the saints with gory torture, and medieval knights were bloodthirsty warlords. Factual · 6 Oct 2011 Philosophy, ethics and society
Mostly true Factual 6 Oct 2011 War is in decline all over the world, as argued in Joshua Goldstein's Winning the War on War. Factual · 6 Oct 2011 Other global risks
Mostly true Factual 6 Oct 2011 Until recently, people brought whole families to watch heretics being burned, broken on the wheel, or disemboweled. Factual · 6 Oct 2011 Philosophy, ethics and society
Mostly true Factual 1 Jan 2007 People estimate the probability of an event from how easily they can recall examples. Factual · 1 Jan 2007 Science and research methods
Mostly true Factual 1 Jan 2007 Violence has declined over long stretches of history, and today is probably the most peaceful time in human history. Factual · 1 Jan 2007 Philosophy, ethics and society
Mostly true Factual 1 Jan 2002 The genome does not contain enough information to specify the brain down to the last synapse, and the brain is not completely shaped by sensory input either. Factual · 1 Jan 2002 Science and research methods
Mostly true Factual 1 Jan 2002 Twins separated at birth are no more different in intelligence and personality than twins raised together; growing up together does not make people more similar in the long run. Factual · 1 Jan 2002 Science and research methods
Mostly true Factual 1 Jan 2002 The connections Pinker draws in his new book between human nature and political systems were prefigured in Enlightenment debates and in the framing of the American Constitution. Factual · 1 Jan 2002 Philosophy, ethics and society
Mostly true Factual 1 Jan 2002 Neuroscience has shown that our thoughts, feelings, urges and consciousness depend completely on the physiological activity of the brain. Factual · 1 Jan 2002 Science and research methods
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Steven Pinker

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Factual AI capabilities

“these systems have anterograde amnesia for everything that happens after 2021.”

Steven Pinker, interviewee 2023 The Intelligence and Rationality of AI and Humans: A Conversation With Steven Pinker (Harvard Data Science Review)

Current large language models are trained on a fixed dataset frozen as of 2021 and have no knowledge of events after 2021.

Mostly true True in substance, wrong in a detail.

What would count as true or false

Judge as of 2023, when the claim was made. The claim is that the prominent LLM systems of the time (e.g., ChatGPT/GPT-3.5, GPT-4) were trained on data ending around 2021 and knew nothing of later events. True: the leading widely used LLMs of 2023 had documented training-data cutoffs in 2021 (e.g., OpenAI's stated September 2021 cutoff) and could not report later events without outside retrieval. Mostly true: the main systems had 2021 cutoffs, but the exact month varied, or a few systems had slightly later cutoffs or limited browsing/retrieval add-ons that the claim leaves out. Mixed: in 2023 roughly as many prominent systems had post-2021 knowledge (later cutoffs or built-in web retrieval, e.g., Bing Chat, Bard) as had 2021 cutoffs. Mostly false: the 2021 cutoff applied only to one product or an early version, while most current LLMs at the time had later cutoffs or live retrieval. False: the main LLMs of 2023 did not have 2021 training cutoffs.

Evidence

  1. Can ChatGPT fact-check? PolitiFact tested. PolitiFact · 30 May 2023
    “It does not have access to any data after September 2021, meaning it is blissfully unaware of big global events such as Queen Elizabeth II’s death and Russia’s invasion of Ukraine.”
  2. Anthropic releases Claude 2, its second-gen AI chatbot | TechCrunch TechCrunch · 11 July 2023
    “Claude 2 was trained on more recent data — a mix of websites, licensed data sets from third parties and voluntarily-supplied user data from early 2023, roughly 10% of which is non-English”
  3. Can Base ChatGPT be Used for Forecasting without Additional Optimization? arXiv (ar5iv rendering) · 19 April 2023
    “we take advantage of the fact that the training data at the time of our experiments (April and May 2023) stopped at September 2021”
  4. ChatGPT and Fake Citations - Duke University Libraries Blogs Duke University Libraries · 9 March 2023
    “ChatGPT’s “knowledge” is based on the dataset that was available before September 2021, and therefore, it may not be able to provide up-to-date information on current events or predict the future.”

Reasoning

Several independent 2023 sources say ChatGPT had no training data after September 2021 and did not know about later events (E1, E3, E4). However, E2 reports that Claude 2, released in July 2023, was trained on more recent data that included material from early 2023. That shows the 2021 cutoff did not apply to every prominent system. The core claim fits the main system, but it leaves out models with later cutoffs, which matches the "mostly true" criterion.

Cite this claim

Steven Pinker, “Current large language models are trained on a fixed dataset frozen as of 2021 and have no knowledge of events after 2021.” (said 2023). Verdict: mostly true. Reliability API, claim c_bfbdbf2a930c, method 0.1.0+28da144b. https://epistacklabs.com/claims/c_bfbdbf2a930c

Claims without a verdict

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