Dev: Lean is incredibly useful for keeping LLMs from being silly in math
willcb · x · 2026-11-01
Developer willcb reports that Lean has proven "incredibly useful" for keeping models from making silly errors in mathematical work, calling it "like Rust for fundamental notions of truth" — formal verification acts as a compiler-style constraint that forces models toward actually correct reasoning instead of plausible-looking wrong calculations.
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