Curiosity and ego seem to be inversely correlated.
If you ask relevant but technically hard and esoteric questions _without the expectation of an answer_ you can sometimes see it in the manner of the response. Do they probe the question? Do they explore the idea, even if they don't know the answer? Do they readily admit that they don't know?? Or do they become defensive? Do they fake their way through it? If they make a mistake and you point it out, how do they respond?
