I'm most impressed by the very smart man who is able to say "I just don't know". Book smart people you'll meet will usually reduce their world down to just 2 options: good or bad, will succeed or will fail. Where's the 3rd option? -- unknown, unknowable, we will see, no emotions because I just don't know.
Admittedly, for most of my life I was never able to find a reason to believe that this 3rd option is a real thing. I always felt that "unknown" is just a temporary placeholder and that the answer is always really there, somewhere, if you're smart enough to see it. Never in all of my schooling was "unknowable and there's nothing we can do to find out" a legitimate answer.
Well, I'm not telling anyone how to think. I'm just fascinated that some people think in these 2 modes, and some in 3.