Are you a nerd? Maybe you're an athlete or an extrovert. Or perhaps you're a, dare I say it, vegan. When you read all of those words some conception of what those things are popped into your head. You probably have some kind of idea what a "nerd" or an "extrovert" does and tendencies they have. A nerd is someone who is really into a certain type of thing, an extrovert is someone who is very outgoing, and a vegan