People value intelligence and will apply that label to themselves even if it may not be true. It's a hard thing to measure though IQ does it reasonably well. To those who have a high IQ: what is it like? Can you pick up any book, read it, and understand the gist with minimal repetition? Can you infer solid and accurate conclusions based on a small amount of evidence? Is any subject or discipline up for grabs or do you have to have a keen interest in a particular field in order to flourish? What is something you are able to do that you know is because of your intelligence -- the proverbial 1,000 pound deadlift of the brain, if you will.
There is no point to these questions other than curiosity.
Conan Doyle even made it a point to state that Holmes willingly kept ignorant of certain things that didn't help him in his endeavors. I believe that was demonstrated through him not knowing the Copernican model of planetary movement and saying he'll just immediately discard it because it doesn't matter if he knows it or not.