Astral Codex Ten

Astral Codex Ten

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Scott Alexander’s essays on rationality, psychology, medicine, and human behavior—often touching self‑mastery.

Support Your Local Collaborator
NewsMar 18, 2026

Support Your Local Collaborator

The author argues that moderate Republicans and conservative‑aligned think‑tank experts are essential buffers against extreme Trump‑era policy proposals, such as bans on aluminum or the blocking of a flu vaccine. Public pressure from liberals to denounce these insiders often backfires,...

By Astral Codex Ten
Shameless Guesses, Not Hallucinations
NewsMar 16, 2026

Shameless Guesses, Not Hallucinations

The article reframes AI “hallucinations” as calculated guesses, likening them to human test‑taking strategies. It explains that during pre‑training, language models are rewarded for any token prediction that reduces loss, so they learn to guess when uncertain. Post‑training alignment work...

By Astral Codex Ten
Open Hidden Open Thread 423.5
NewsMar 4, 2026

Open Hidden Open Thread 423.5

OpenAI has signed a new contract with the U.S. Department of Defense, expanding its involvement in Pentagon projects. The agreement’s surveillance language contains numerous ambiguities that could allow broad data collection. Critics on LessWrong highlight potential loopholes that may undermine...

By Astral Codex Ten
"All Lawful Use": Much More Than You Wanted To Know
NewsMar 1, 2026

"All Lawful Use": Much More Than You Wanted To Know

Secretary of War Pete Hegseth designated AI firm Anthropic a supply‑chain risk after it refused to let the Department of War use its models for mass surveillance or autonomous weapons. Hours later, OpenAI announced an agreement‑in‑principle to fill the gap,...

By Astral Codex Ten