I can't really put my finger what (falsely!) tipped me off here.

I think the short, single clause, internal-monologue-ish sentences is what did it?

> I am reading the post again. It does appear the author is not fully aware what DFU is supposed to do.

That especially came off like an LLM being called out on being wrong about something?

Ah yes the woke practice of the singular they, when gender doesn't matter or is ambiguous. Which a hundo-percent never existed before scary mean woke-ism.