It's probably from the perennial observation

"This LLM is kinda dumb in the thing I'm an expert in"

This is just not true at this point but believe whatever you want to believe.

Perennial doesn't make sense in the context of something that has been around for a few months. Observations from the spring 2025 crop of LLMs are already irrelevant.

… “but I guess it was able to formalize it in Lean, so…”