Are Lean soundness bugs a real risk? Weighing how AI proofs translate to ZFC

jessi_cata · x · 2026-09-11

The author argues soundness bugs in Lean may be less concerning because automated search for them is feasible—if a proof exploits a soundness bug, extracting a certificate should be possible.

They pose a concrete, testable question: to what degree do typical Lean-based AI proof results translate to ZFC, and how feasibly. Risks include genuine Lean soundness bugs and proofs implicitly relying on strong axioms, though the author suspects Lean-to-ZFC translation mostly works.

Related event: Can Lean AI Proofs Be Translated to ZFC?(2 posts)→

Original post →

More from Research

Research channel →