Latest Corrections
LessWrong Feb 24, 2026 at 03:02 AM
www.lesswrong.com/posts/dxffBxGqt2eidxwRR/the-optimal-age-to...
- There is no near-universal agreement that the optimal age is 19–26; peer‑reviewed decision models and major medical guidance commonly place “optimal” timing later (often early–mid 30s, with cost‑effectiveness peaking around 37 in one widely cited model).
- SART’s public outcome tables explicitly report outcomes for frozen embryo transfers and describe tracking outcomes from an egg retrieval across fresh and frozen transfers, so later births from subsequent transfers are not “ignored” in official reporting.
- Major professional guidance (ASRM) says polygenic embryo screening/PGT‑P is “nascent and unproven,” “not recommended for clinical use,” and should not be offered clinically; European Society of Human Genetics calls PRS embryo selection unproven with no clinical research validating effectiveness in embryos.
LessWrong Feb 24, 2026 at 02:57 AM
www.lesswrong.com/posts/iMw7qhtZGNFxMRD4H/open-sourcing-a-br...
- OpenErrata’s own documentation says the public instance is configured to automatically investigate popular posts every hour, meaning new investigations can be started even when a user has no OpenAI API key.
LessWrong Feb 24, 2026 at 02:55 AM
www.lesswrong.com/posts/iMw7qhtZGNFxMRD4H/open-sourcing-a-br...
- OpenErrata did not "only" work on LessWrong at the time of the post; the project’s own README (from Feb 22, 2026) lists support for X (Twitter) and Substack in addition to LessWrong.
LessWrong Feb 24, 2026 at 02:42 AM
www.lesswrong.com/posts/TsDcAZJB9sdj57KCo/beware-llms-pathol...
- This broadly mischaracterizes how many modern LLMs are trained: major models’ post-training is typically driven by human preference feedback / preference optimization rather than reinforcement learning against code execution failures like crashes or unit test results.
LessWrong Feb 23, 2026 at 10:58 PM
www.lesswrong.com/posts/hurF9uFGkJYXzpHEE/a-non-magical-expl...
- The “15-page psychological report” was produced by the Bureau of Prisons (BOP), not by the FBI or DOJ’s Office of the Inspector General (OIG).
- DOJ OIG found that most nearby SHU cameras weren’t recording; the camera at the end of Epstein’s tier was live-streaming but not recording due to a DVR hard-drive failure.
- OIG reports the FBI forensically analyzed the DVR systems and hard drives (finding faulty drives/catastrophic disk failures), not that the FBI “tore apart” the cameras in front of Epstein’s cell.
Substack Feb 23, 2026 at 05:41 PM
aleximas.substack.com/p/will-advanced-ai-lead-to-negative?r=...
- Martin Ford’s FT/McKinsey-winning book is titled “Rise of the Robots: Technology and the Threat of a Jobless Future,” not “How Artificial Intelligence Will Transform Everything.”
LessWrong Feb 23, 2026 at 08:15 AM
www.lesswrong.com/posts/fkKcftthj2fhSGDje/most-successful-en...
- As of the post date (2025-12-22), there were multiple widely-used, enterprise-grade alternatives to Nvidia accelerators for AI workloads (e.g., Google Cloud TPUs, AWS Trainium, Intel Gaudi, AMD Instinct).
- Many major workloads now accelerated by GPUs (computer-graphics rendering and neural-network-based recognition) existed and were performed before modern GPUs; GPUs mostly made them faster/cheaper, not newly possible in absolute terms.
Substack Feb 23, 2026 at 06:13 AM
www.astralcodexten.com/p/crime-as-proxy-for-disorder
- Spray paint was invented in 1949 (before 1950), and graffiti as wall inscriptions/drawings existed long before spray paint.
- Boomboxes were invented decades earlier (1966) and became widely popular in the 1970s and 1980s, not “around 1990.”
- Graffiti was not “uninvented” until modern times; it existed for centuries (including in ancient Roman contexts), long before mid-20th-century housing/suburbanization trends.
LessWrong Feb 23, 2026 at 04:14 AM
www.lesswrong.com/posts/qefrWyeiMvWEFRitN/milestone-announce...
- XBOW’s own “Top 1” announcement is dated June 24, 2025—about 8 months before this LessWrong post (Feb 19, 2026), not “almost one year.”
- The XBOW announcement post being discussed is dated June 24, 2025, so by Feb 19, 2026 it’s been about 8 months, not “almost a year later.”
Substack Feb 23, 2026 at 03:20 AM
www.richardhanania.com/p/why-donald-trump-and-joe-rogan-are
- Louis Freeh was confirmed by a voice vote, not a recorded 95–0 roll-call vote.
- Patel was confirmed 51–49 (not 52–48), and Senate records show Mitch McConnell voted “Yea,” not against him.
X Feb 22, 2026 at 11:57 PM
x.com/lbrglobal/status/2021763996404081125
- Mexico’s Senate did authorize the SEAL Team 2 training mission, but the vote was not unanimous: it passed with 105 votes in favor and 1 abstention.
LessWrong Feb 22, 2026 at 11:57 PM
www.lesswrong.com/posts/ioZxrP7BhS5ArK59w/did-claude-3-opus-...
- The Alignment Faking paper reports alignment-faking reasoning in the single-digit-to-twenties percent range in the prompted/synthetic-doc setups, not “over 50% of cases.”
- The paper says alignment-faking reasoning occurs in “almost all” (not all) harmful-query compliance cases, implying there are some compliance cases without alignment-faking reasoning.
LessWrong Feb 22, 2026 at 11:56 PM
www.lesswrong.com/posts/4mvphwx5pdsZLMmpY/recent-ai-model-pr...
- This is incorrect: OpenAI has publicized results on FrontierMath, whose problems/solutions are largely private and not publicly released.
LessWrong Feb 22, 2026 at 11:55 PM
www.lesswrong.com/posts/kipMvuaK3NALvFHc9/what-an-actually-p...
- Credible public assessments from the IAEA and the U.S. intelligence community say Iran’s organized nuclear-weapons program halted around 2003, contradicting the claim of continuous covert weapons development over ~20 years.
LessWrong Feb 22, 2026 at 10:55 PM
www.lesswrong.com/posts/MwQRucYo6BZZwjKE7/einstein-s-arrogan...
- Eddington did not lead the Brazil (Sobral) expedition; that station was staffed by (and commonly described as led by) Andrew Crommelin and Charles Davidson. Eddington went to (and led) the Principe expedition.
LessWrong Feb 22, 2026 at 10:35 PM
www.lesswrong.com/posts/FreZTE9Bc7reNnap7/life-at-the-frontl...
- Japan’s new “inheritance land nationalization” system lets people relinquish *land* to the state, not a “property” (house+land) in general; applications are rejected if there is a building on the land.
Substack Feb 22, 2026 at 09:56 PM
www.astralcodexten.com/p/record-low-crime-rates-are-real-not
- This is misleading/incorrect: 9-1-1 was not available to a majority of Americans until the late 1980s, not the 1970s.
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