This is mostly confirmation bias. It's quite common to be 'kind of crazy', and it happens at all levels of intellect, from your working-class 'nutter' to your h

This is mostly confirmation bias. It's quite common to be 'kind of crazy', and it happens at all levels of intellect, from your working-class 'nutter' to your high-born 'eccentric'. There's nothing special about being smart when it comes to being 'kind of crazy'.