Lean Formalization Not a Cure-All: IUT Proof Controversy Sparks Debate on AI-Assisted Math

rbhar90 · x · 2026-08-01

Mathematician Kirti Joshi has responded to Kato et al.'s attempted Lean formalization of Mochizuki's IUT theory, arguing they may have missed a critical point. Commenter rbhar90 notes this back-and-forth shows Lean is not a cure-all: choices of assumptions and simplifications in formalization (not to mention Lean errors) mean a Lean proof should be taken as one form of evidence, not conclusive.

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