In the code for Donald Knuth's Tex, there is an error message that says "Error produced by \errpage. I can't produce an error message. Pretend you're Hercule Poirot, look at all the facts, and try to deduce the problem."

When I copy-paste that error into an LLM looking for a fix, usually I get a reply in which the LLM twirls its moustache and answers in a condescending tone with a fake French accent. It is hilarious.

Use those little grey cells!