Quoting famous people sounds smart until you realize they just memorized a ton of trivia. These models have demonstrated that they don't learn logical models, instead they learn to generate text that looks logical at first glance but is nonsense.
I'm sure if I kept probing on smaller and smaller details it would eventually fail, but I'd argue for _most_ people, on _most_ subjects, it performs incredibly well.
A real test of it's abilities would be synthesizing a NEW type of nuclear reactor.