What Dan Abramov thinks about formal proof

@dan-abramov · 12 positions · On ppll ↗

Co-creator of Redux and long-time core contributor to the React team; writes about JavaScript and software design at overreacted.io.

Dan Abramov did not write this page.

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Only Dan Abramov on formal proof. See everyone on formal proof

1 dated position, 2026, in their own words. Our reading of what Dan Abramov has said — not written or endorsed by them.

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1. 18 Sept 2026

   Our readingNovel mathematical claims produced by an AI must be formally verified, such as in a proof assistant, before they can be trusted as legitimate results.

   Their wordsI needed to back it up with Lean before laying more bricks on top of existing bricks, and I definitely needed to verify things with Lean before making any novel mathematical claims.

   ↗How I Vibed a Proof of Conway’s Conjectureoverreacted.io 1st of 2 in this piece