[bryanrasmussen]

If someone answered every question the way the interviewer thought it should be answered that is probably an indicator of lack of diversity of thought, but I think it would actually be hard to spot because they would really look like the perfect candidate - unless the interviewer thought of themselves as a bad candidate / unoriginal thinker - which is unlikely.

On the other hand someone answers in a way that you have decided before hand is just the misguided answers of a particular tribe can be lack of diversity of thought, because you happen to be right about the preconceived ideas of said tribe, but pretty hard not to see that as the result of bias.

If on the other hand someone says some things you don't understand, espouses ideas completely alien - insane!

on edit: clarification