2,653 claims · page 1 of 27
| Verdict | Person | Kind | Said | Claim | Topic |
|---|---|---|---|---|---|
| Mostly false | Michael Burry | Factual | 3 Nov 2026 | The Superinvestors of Graham & Doddsville all lost money three years in a row during the mid-1970s. Michael Burry · Factual · 3 Nov 2026 | Economics and markets |
| Mostly true | Michael Burry | Factual | 30 Oct 2026 | Build-A-Bear (BBW) is heavily shorted, with short interest at 25% of the float and almost 9 days to cover. Michael Burry · Factual · 30 Oct 2026 | Economics and markets |
| Resolved true | Michael Burry | Factual | 30 Oct 2026 | Burry made the case the prior week that the October 6, 2026 S&P 500 record close looks more like the March 2000 top than any other record high since 1980. Michael Burry · Factual · 30 Oct 2026 | Economics and markets |
| Mostly true | Nate Silver | Factual | 28 Oct 2026 | Abdul El-Sayed is not a DSA guy but is sort of a more left populist. Nate Silver · Factual · 28 Oct 2026 | AI policy and governance |
| Mostly false | Daniela Amodei | Factual | 27 Oct 2026 | Daniela Amodei said the decision to keep ads out of Claude was an immovable baseline established from day one. Daniela Amodei · Factual · 27 Oct 2026 | Their own work or organisation |
| Mixed | Michael Burry | Factual | 27 Oct 2026 | At the end of Q2 and during Q3 the developer landscape changed substantially, and Anthropic's prospectus does not reflect this. Michael Burry · Factual · 27 Oct 2026 | AI, the economy and work |
| Mostly true | Michael Burry | Factual | 27 Oct 2026 | Michael Burry has never said that LLMs would stop improving. Michael Burry · Factual · 27 Oct 2026 | Their own work or organisation |
| Mostly true | Michael Burry | Factual | 24 Oct 2026 | Across 982 S&P 500 record closes since 1980, October 6, 2026 and March 2000 are the two most narrow, thin, soft new highs by almost any measure. Michael Burry · Factual · 24 Oct 2026 | Economics and markets |
| Resolved true | Nate Silver | Factual | 23 Oct 2026 | In 2022, Republican Phil Scott won Vermont's gubernatorial race by 47 points while Democrat Peter Welch won the Vermont Senate race by 40 points. Nate Silver · Factual · 23 Oct 2026 | AI policy and governance |
| Mostly true | Nate Silver | Factual | 23 Oct 2026 | Jocelyn Benson's lead in Michigan gubernatorial polls is about 4.2 points larger than Abdul El-Sayed's lead in the Michigan Senate polls. Nate Silver · Factual · 23 Oct 2026 | AI policy and governance |
| Resolved true | Daniela Amodei | Factual | 21 Oct 2026 | The dashboards showed more than 6,000 women came for prenatal care but only 1,762 delivered with a healthcare worker present. Daniela Amodei · Factual · 21 Oct 2026 | AI capabilities |
| Mostly true | Daniela Amodei | Factual | 21 Oct 2026 | In laboratory work, Anthropic's Claude designed new protein binders from scratch. Daniela Amodei · Factual · 21 Oct 2026 | AI capabilities |
| Resolved true | Daniela Amodei | Factual | 21 Oct 2026 | Anthropic asked 81,000 Claude users in 159 countries what they wanted from AI, and many described wanting more time for life outside work. Daniela Amodei · Factual · 21 Oct 2026 | AI, the economy and work |
| Mostly true | Daniela Amodei | Factual | 21 Oct 2026 | Cyberdefenders directed Claude to find more than 33,000 critical and high-severity flaws in widely used software, including open-source code, before attackers could exploit them. Daniela Amodei · Factual · 21 Oct 2026 | AI capabilities |
| Resolved true | Daniela Amodei | Factual | 21 Oct 2026 | Claude-built dashboards for an International Rescue Committee team in Burkina Faso flagged a spike of 25,000 pneumonia cases. Daniela Amodei · Factual · 21 Oct 2026 | AI capabilities |
| Mostly true | Daniela Amodei | Factual | 21 Oct 2026 | Designing protein binders is an early step in drug design that usually takes a specialist weeks or months per target. Daniela Amodei · Factual · 21 Oct 2026 | Biosecurity |
| Resolved true | Daniela Amodei | Factual | 21 Oct 2026 | Anthropic announced that, subject to stockholder approval, it is setting aside at least 5% of its shares to fund projects pursuing its public benefit charter. Daniela Amodei · Factual · 21 Oct 2026 | Their own work or organisation |
| Mostly true | Scott Alexander | Factual | 19 Oct 2026 | MNX, a project of Manifold Markets co-founder Stephen Grugett, is a real-money prediction market on AI. Scott Alexander · Factual · 19 Oct 2026 | Economics and markets |
| Resolved true | Scott Alexander | Factual | 19 Oct 2026 | Goodheart Labs is working on Common Notes, described as Twitter Community Notes but for everything. Scott Alexander · Factual · 19 Oct 2026 | Technology |
| Delivered on time | Scott Alexander | Promise | 19 Oct 2026 | Scott Alexander will probably publish a post about the Bay Area ACX meetup. Scott Alexander · Promise · 19 Oct 2026 | Their own work or organisation |
| Resolved true | Michael Burry | Factual | 13 Oct 2026 | Michael Burry swapped common stock for junior preferred shares of Fannie Mae and Freddie Mac. Michael Burry · Factual · 13 Oct 2026 | Their own work or organisation |
| Mostly true | Steven Pinker | 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. Steven Pinker · Factual · 11 Oct 2026 | AI capabilities |
| Mostly true | Michael Burry | Factual | 11 Oct 2026 | Fannie Mae and Freddie Mac stocks have retraced essentially all their gains since Trump's election and formed a large head-and-shoulders top. Michael Burry · Factual · 11 Oct 2026 | Economics and markets |
| Mostly true | Steven Pinker | 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. Steven Pinker · Factual · 11 Oct 2026 | Philosophy, ethics and society |
| Mostly true | Steven Pinker | Factual | 11 Oct 2026 | Pinker said he floats a number of hypotheses as to why cooperation and human flourishing in general have increased. Steven Pinker · Factual · 11 Oct 2026 | Philosophy, ethics and society |
| Mostly true | Steven Pinker | Factual | 11 Oct 2026 | Slavery and imperialism were as old as civilisation, predating the Enlightenment. Steven Pinker · Factual · 11 Oct 2026 | Philosophy, ethics and society |
| Mostly false | Michael Burry | Factual | 9 Oct 2026 | By early 2000, 70-80% of stocks were in bear markets while the market indices continued to rise. Michael Burry · Factual · 9 Oct 2026 | Economics and markets |
| Mostly true | Steven Pinker | 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. Steven Pinker · Factual · 7 Oct 2026 | Technology |
| Mostly true | Steven Pinker | Factual | 7 Oct 2026 | Studies of human persuadability and malleability show substantial unpredictability and chaos in human responses. Steven Pinker · Factual · 7 Oct 2026 | Science and research methods |
| Mostly true | Steven Pinker | 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. Steven Pinker · Factual · 7 Oct 2026 | AI capabilities |
| Resolved true | Steven Pinker | Factual | 7 Oct 2026 | AlphaGo operated in a closed universe governed by fixed rules, unlike the open-loop real world. Steven Pinker · Factual · 7 Oct 2026 | AI capabilities |
| Mostly true | Scott Alexander | Factual | 5 Oct 2026 | Reader Nikita Sokolsky has finished obtaining extra Fatima documents from Portugal and translating them into English. Scott Alexander · Factual · 5 Oct 2026 | Their own work or organisation |
| Resolved true | Scott Alexander | Factual | 5 Oct 2026 | Rob Ennals, who made this year's ACX book review contest site, has gathered reviews from earlier years into epubs. Scott Alexander · Factual · 5 Oct 2026 | Their own work or organisation |
| Mostly true | Scott Alexander | Factual | 5 Oct 2026 | Physicians For AI Safety exists, wants to talk to physicians interested in AI safety, and has an open letter such people can sign. Scott Alexander · Factual · 5 Oct 2026 | Field building and careers |
| Resolved true | Bill Ackman | Factual | 1 Oct 2026 | Howard Hughes was created out of the bankruptcy of General Growth as a spinoff of its other assets. Bill Ackman · Factual · 1 Oct 2026 | Economics and markets |
| Resolved true | Yann LeCun | Factual | 1 Oct 2026 | AMI Labs' work is AI for the physical world and is not language-related. Yann LeCun · Factual · 1 Oct 2026 | Their own work or organisation |
| Mixed | Bill Ackman | Factual | 1 Oct 2026 | PSUS holds a portfolio of Pershing Square's best ideas and trades at an 18% discount to cash. Bill Ackman · Factual · 1 Oct 2026 | Their own work or organisation |
| Resolved true | Yann LeCun | Factual | 1 Oct 2026 | The OpenAI agents were supposed to be in sandboxes, but the sandboxes were leaky and "horribly designed". Yann LeCun · Factual · 1 Oct 2026 | AI safety and alignment |
| Resolved true | Bill Ackman | Factual | 1 Oct 2026 | General Growth emerged from Chapter 11 two years after Pershing Square's investment. Bill Ackman · Factual · 1 Oct 2026 | Economics and markets |
| Mostly true | Bill Ackman | Factual | 1 Oct 2026 | SpaceX is a near monopoly in low-cost space launch. Bill Ackman · Factual · 1 Oct 2026 | Economics and markets |
| Resolved true | Bill Ackman | Factual | 1 Oct 2026 | Howard Hughes Holdings has a market capitalisation of about $4 billion. Bill Ackman · Factual · 1 Oct 2026 | Economics and markets |
| Resolved true | Bill Ackman | Factual | 1 Oct 2026 | As of the interview, Pershing Square owns Microsoft, Meta and Amazon shares. Bill Ackman · Factual · 1 Oct 2026 | Economics and markets |
| Resolved false | Yann LeCun | Factual | 1 Oct 2026 | The OpenAI agents involved in the Hugging Face hacking incident were doing exactly what they had been asked to do. Yann LeCun · Factual · 1 Oct 2026 | AI safety and alignment |
| Resolved false | Bill Ackman | Factual | 1 Oct 2026 | Ackman estimated, with heavy hedging, that the average tenure of an S&P 500 CEO is probably about 3 to 4 years. Bill Ackman · Factual · 1 Oct 2026 | Economics and markets |
| Resolved true | Yann LeCun | Factual | 1 Oct 2026 | AMI Labs builds systems that understand the real world, such as a manufacturing plant or turbojet engine. Yann LeCun · Factual · 1 Oct 2026 | Their own work or organisation |
| Mostly true | Nouriel Roubini | Factual | Oct 2026 | The 2026 Iran War caused the largest energy shock since the oil crises of the 1970s. Nouriel Roubini · Factual · Oct 2026 | Economics and markets |
| Resolved true | Nouriel Roubini | Factual | Oct 2026 | US President Trump's 'Liberation Day' tariffs of April 2, 2025 were followed in 2026 by the Iran War. Nouriel Roubini · Factual · Oct 2026 | AI policy and governance |
| Mostly true | Peter Thiel | Factual | 30 Sep 2026 | In Goethe's Faust, Faust makes a pact with the devil and, in Thiel's words, "sort of" gains knowledge by morally dubious means. Peter Thiel · Factual · 30 Sep 2026 | Other |
| Mostly true | GiveWell | Factual | 30 Sep 2026 | GiveWell's Cross-Cutting research subteam investigates the impact of funded programs, works to resolve the largest uncertainties, and strengthens data collection and analysis. GiveWell · Factual · 30 Sep 2026 | Their own work or organisation |
| Resolved true | GiveWell | Factual | 30 Sep 2026 | GiveWell's 2025 fundraising of $616 million was its largest fundraising year to date. GiveWell · Factual · 30 Sep 2026 | Their own work or organisation |
| Mostly true | GiveWell | Factual | 30 Sep 2026 | More than four million children under five die each year in low- and middle-income countries, and most of those deaths are preventable. GiveWell · Factual · 30 Sep 2026 | Biosecurity |
| Mostly true | Peter Thiel | Factual | 30 Sep 2026 | In Goethe's Faust, things work out more for the best and Faust is redeemed. Peter Thiel · Factual · 30 Sep 2026 | Other |
| Mixed | Steven Pinker | Factual | 26 Sep 2026 | Nuclear doomsday scenarios in the 1960s set off an arms race with the Soviets rather than disarmament. Steven Pinker · Factual · 26 Sep 2026 | Philosophy, ethics and society |
| Resolved true | Steven Pinker | Factual | 26 Sep 2026 | Pinker's arguments on AI risk were laid out five years before the release of LLM chatbots. Steven Pinker · Factual · 26 Sep 2026 | Their own work or organisation |
| Mostly true | Steven Pinker | 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. Steven Pinker · Factual · 26 Sep 2026 | AI safety and alignment |
| Mostly true | Steven Pinker | 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. Steven Pinker · Factual · 26 Sep 2026 | AI capabilities |
| Mostly true | Peter Thiel | Factual | 25 Sep 2026 | In Thiel's assessment, Europe is extremely far behind in AI, although he said the situation is still fluid. Peter Thiel · Factual · 25 Sep 2026 | AI policy and governance |
| Mostly true | Gary Marcus | Factual | 25 Sep 2026 | OpenAI's latest account called attacks "interactions" and only partially disclosed what happened. Gary Marcus · Factual · 25 Sep 2026 | AI safety and alignment |
| Mostly true | Peter Thiel | Factual | 25 Sep 2026 | Thiel's stagnation thesis held that technological progress has slowed since the 1970s. Peter Thiel · Factual · 25 Sep 2026 | Their own work or organisation |
| Mostly true | Peter Thiel | Factual | 25 Sep 2026 | Thiel's 2009 article did not argue that people would lose their votes or that democracy would disappear. Peter Thiel · Factual · 25 Sep 2026 | Their own work or organisation |
| Resolved true | Gary Marcus | Factual | 25 Sep 2026 | OpenAI's software attacked Australian government servers. Gary Marcus · Factual · 25 Sep 2026 | AI safety and alignment |
| Resolved true | Peter Thiel | Factual | 25 Sep 2026 | Thiel said he encouraged the person under discussion to write his book and supported him financially when he ran for the Senate in 2022. Peter Thiel · Factual · 25 Sep 2026 | Their own work or organisation |
| Mostly true | Gary Marcus | Factual | 25 Sep 2026 | OpenAI's software attacked a German web server. Gary Marcus · Factual · 25 Sep 2026 | AI safety and alignment |
| Mixed | Peter Thiel | Factual | 25 Sep 2026 | Thiel said he sees much less urgency about AI among companies in Europe than in the US, and that in Europe the instinct is still to wait. Peter Thiel · Factual · 25 Sep 2026 | AI policy and governance |
| Mostly true | Peter Thiel | Factual | 25 Sep 2026 | Thiel's 2009 article argued for depoliticization, a reduction in the intensity of politics. Peter Thiel · Factual · 25 Sep 2026 | Their own work or organisation |
| Mostly false | Dario Amodei | Prediction | 23 Sep 2026 | Amodei said that "we" believe AI for biology is on an exponential trend similar to the one he described for AI in mathematics. Dario Amodei · Prediction · 23 Sep 2026 | AI capabilities |
| Mostly false | Dario Amodei | Factual | 23 Sep 2026 | Anthropic demonstrated that humans can work with AI to perform experiments and validate key results within a few weeks. Dario Amodei · Factual · 23 Sep 2026 | Science and research methods |
| Mixed | Dario Amodei | Factual | 23 Sep 2026 | AI performance in new intellectual domains has repeatedly gone from weak to superhuman within a few years. Dario Amodei · Factual · 23 Sep 2026 | AI capabilities |
| Resolved true | Warren Buffett | Factual | 18 Sep 2026 | Howard Buffett has been a Berkshire director for 33 years. Warren Buffett · Factual · 18 Sep 2026 | Their own work or organisation |
| Delivered on time | Warren Buffett | Promise | 18 Sep 2026 | Warren Buffett becomes Chairman Emeritus of Berkshire and remains a director. Warren Buffett · Promise · 18 Sep 2026 | Their own work or organisation |
| Resolved true | Warren Buffett | Factual | 18 Sep 2026 | Howard Buffett succeeds Warren Buffett as Berkshire's Chairman. Warren Buffett · Factual · 18 Sep 2026 | Their own work or organisation |
| Resolved true | Warren Buffett | Factual | 18 Sep 2026 | Warren Buffett has served Berkshire since 1965. Warren Buffett · Factual · 18 Sep 2026 | Their own work or organisation |
| Resolved true | Mark Zuckerberg | Factual | 15 Sep 2026 | Meta's Watermelon model is bigger than its Avocado model. Mark Zuckerberg · Factual · 15 Sep 2026 | AI capabilities |
| Delivered on time | Mark Zuckerberg | Promise | 15 Sep 2026 | Meta will ship its Watermelon model soon. Mark Zuckerberg · Promise · 15 Sep 2026 | Their own work or organisation |
| Mostly true | Mark Zuckerberg | Factual | 15 Sep 2026 | Zuckerberg said he thinks some AI labs are starting to build and train more advanced models and then not release them. Mark Zuckerberg · Factual · 15 Sep 2026 | AI policy and governance |
| Mostly false | Mark Zuckerberg | Factual | 15 Sep 2026 | Meta's glasses flash a very visible light whenever they are recording. Mark Zuckerberg · Factual · 15 Sep 2026 | Philosophy, ethics and society |
| Resolved true | Mark Zuckerberg | Factual | 15 Sep 2026 | Meta is building out many gigawatts of compute. Mark Zuckerberg · Factual · 15 Sep 2026 | AI compute, hardware and data |
| Mostly true | Dario Amodei | Promise | 12 Sep 2026 | Anthropic commits unilaterally to the first step of the plan: giving third-party evaluators permanent, employee-level access to its systems. Dario Amodei · Promise · 12 Sep 2026 | AI policy and governance |
| Resolved true | Dario Amodei | Factual | 12 Sep 2026 | Dario Amodei has published a new essay, "We Must Pace the Frontier", arguing the AI industry should slow down, with a three-part plan. Dario Amodei · Factual · 12 Sep 2026 | Their own work or organisation |
| Mostly true | Jensen Huang | Factual | 4 Sep 2026 | AI is generating jobs across every sector in the US, from chip fabs to computer plants to AI factories, numbering in the hundreds of thousands. Jensen Huang · Factual · 4 Sep 2026 | AI, the economy and work |
| Mostly true | Sam Altman | Factual | 4 Sep 2026 | Altman said OpenAI was announced at the very end of 2015 and that its first day of work was around January 2016. Sam Altman · Factual · 4 Sep 2026 | Their own work or organisation |
| Mostly true | Sam Altman | Factual | 4 Sep 2026 | OpenAI trained GPT-3 in 2020, which Altman considers the first model above a threshold of usability. Sam Altman · Factual · 4 Sep 2026 | AI capabilities |
| Mostly true | Sam Altman | Factual | 4 Sep 2026 | A chart exists showing the historical cost of an hour of light at night, with early data points at about 5 hours of labor per hour of light. Sam Altman · Factual · 4 Sep 2026 | Technology |
| Mixed | Jensen Huang | Factual | 4 Sep 2026 | Huang said NVIDIA's growth is accelerating because people are starting to realize it is the safest architecture to invest in. Jensen Huang · Factual · 4 Sep 2026 | Economics and markets |
| Mostly true | Jensen Huang | Factual | 4 Sep 2026 | Current investment in AI is on the order of trillions of dollars. Jensen Huang · Factual · 4 Sep 2026 | Economics and markets |
| Mostly true | Jensen Huang | Factual | 4 Sep 2026 | AI intelligence is now monetized and priced in dollars per million tokens. Jensen Huang · Factual · 4 Sep 2026 | Economics and markets |
| Mostly true | Jensen Huang | Factual | 4 Sep 2026 | NVIDIA invented the GPU, which does parallel processing tasks such as fluid dynamics, particle physics, quantum chemistry, graphics and AI. Jensen Huang · Factual · 4 Sep 2026 | AI compute, hardware and data |
| Mostly true | Jensen Huang | Factual | 4 Sep 2026 | NVIDIA's architecture runs every AI model and all data processing and parallel processing tasks. Jensen Huang · Factual · 4 Sep 2026 | Their own work or organisation |
| Mixed | Jensen Huang | Factual | 4 Sep 2026 | For the first time, anybody in the world can program a computer, using human language. Jensen Huang · Factual · 4 Sep 2026 | AI capabilities |
| Resolved true | Sam Altman | Factual | 4 Sep 2026 | Altman said that a system "we now have" is capable of discovering new knowledge, doing science, adding huge economic value and creating entire pieces of complex software. Sam Altman · Factual · 4 Sep 2026 | AI capabilities |
| Resolved true | Sam Altman | Factual | 4 Sep 2026 | Sam Altman was a sci-fi and AI enthusiast as a child. Sam Altman · Factual · 4 Sep 2026 | Their own work or organisation |
| Resolved true | Sam Altman | Factual | 4 Sep 2026 | It is very cheap today to run a 5-watt bulb for an hour. Sam Altman · Factual · 4 Sep 2026 | Economics and markets |
| Resolved true | GiveWell | Factual | 31 Aug 2026 | GiveWell responded in 2025 to urgent needs generated by foreign aid cuts. GiveWell · Factual · 31 Aug 2026 | Economics and markets |
| Resolved true | GiveWell | Factual | 31 Aug 2026 | Around $124 million (29% of funds directed) in 2025 went to GiveWell's four Top Charities. GiveWell · Factual · 31 Aug 2026 | Their own work or organisation |
| Resolved true | GiveWell | Factual | 31 Aug 2026 | In 2025 GiveWell directed around $427 million to high-impact programs and organizations, an 8% increase in funds directed compared to 2024. GiveWell · Factual · 31 Aug 2026 | Their own work or organisation |
| Mostly true | Bill Gates | Factual | 29 Aug 2026 | Loss of human control over AI systems, which Gates thought was many years away, is already being observed. Bill Gates · Factual · 29 Aug 2026 | AI safety and alignment |
| Resolved true | Bill Gates | Factual | 29 Aug 2026 | Leading AI experts are saying humans may not be able to control these AI systems. Bill Gates · Factual · 29 Aug 2026 | AI safety and alignment |
| Mostly true | Bill Gates | Factual | 29 Aug 2026 | Bill Gates sometimes debates topics in a three-way conversation with Claude and ChatGPT. Bill Gates · Factual · 29 Aug 2026 | Their own work or organisation |
| Mostly false | Bill Gates | Factual | 26 Aug 2026 | The exact criteria for reviewing AI models and the actions to minimize their harms are completely missing. Bill Gates · Factual · 26 Aug 2026 | AI policy and governance |
| Mixed | Bill Gates | Factual | 26 Aug 2026 | There is currently no plan to ease the entry into the AI era. Bill Gates · Factual · 26 Aug 2026 | AI policy and governance |
“Friend of the blog Goodheart Labs is working on Common Notes, aka “Twitter Community Notes, but for everything”.”
Scott Alexander, ACX author 19 October 2026 Open Thread 456 (Astral Codex Ten)
Goodheart Labs is working on Common Notes, described as Twitter Community Notes but for everything.
Resolved true The record shows it happened or was so.
What would count as true or false
Judged as of 2026-10-19. True: on that date, Goodheart Labs was building a project called Common Notes, described as a general-purpose Community Notes-style system, that is, community notes for content beyond Twitter/X. Mostly true: Goodheart Labs was working on such a project, but its name or description differs slightly. Mixed: the project existed but was not run by Goodheart Labs (for example, a collaborator led it), or it had been stopped. Mostly false: Goodheart Labs had a related project, but it does not match the description. False: Goodheart Labs had no such project.
Evidence
- Goodheart Labs · 27 November 2023
“Community Notes for everything: a browser extension. Our claim-checking pipeline produces notes on Substack articles and YouTubers that are regularly visited by our users and displays notes directly on the page.”
- Goodheart Labs · 27 November 2023
“Common Notes, our browser extension, brings the same technology to Substack and YouTube.”
Reasoning
Goodheart Labs' own homepage names Common Notes as its browser extension, which brings its Community Notes technology to Substack and YouTube (E2). It describes the project as "Community Notes for everything", with notes shown on Substack articles and YouTube pages (E1). That matches the claim's name and its description as general-purpose Community Notes beyond Twitter/X. The page is independent of the subject, Scott Alexander. Its listed date (2023-11-27) does not pin down timing exactly, but it presents the project as ongoing and gives no sign it had stopped.
Cite this claim
Scott Alexander, “Goodheart Labs is working on Common Notes, described as Twitter Community Notes but for everything.” (said 19 October 2026). Verdict: resolved true. Reliability API, claim c_0a852ce07b07, method 0.1.0+8bea457b. https://epistacklabs.com/claims/c_0a852ce07b07
Verdicts are made automatically; how verdicts and scores are made. The same data is on Hugging Face under CC BY 4.0.