If he didn't understand the question how could he know the model answered it perfectly?

Also, 'thing that I don't know about but is broadly and uncontroversially known and documented by others' is sort of dead center of the value proposition for current-generation LLMs and also doesn't make very impressive marketing copy.

Unless he's saying that he fed it an unknown-to-experts-in-the-field question and it figured it out in which case I am very skeptical.