Yes, however any LLM agent you asked about that proof could tell you that. (And even most humans who know a little bit about the bug.) You are right that Lean

Yes, however any LLM agent you asked about that proof could tell you that. (And even most humans who know a little bit about the bug.) You are right that Lean isn't great in this respect, and people are working on proof formalisations that are less prone to bugs.