I once had a seat number on a long distance train. for 150 miles. my seatmate, who was already on the train, was a college PHD professor of Humanities for an elite woman's university in a huge Northern city. only the smartest girls go there.
I said "hello", then he talked a bit. there was nothing more that i could say! his IQ might have been 140 and he talked so so cerebrally
and intellectually, he could drop ten names of movies and the actors and the producers, before I could even think of one movie! we two did not exchange one more word for the whole trip: he might as well have come from an alien planet, and in a way he did as he thought in words and i thought only in images!