"i think they wear hats cos they dont have fur"
"what? what? why? how is that related?"
"they wear hats to avoid sunburn, cos they dont have thick fur like us"
"you cant just make such sweeping pronouncements, correlation isnt causation"
"well, what's your idea then? why hats?"
"i dont know, we've been solving increasingly tricky trash can problems but we're no nearer to gaining their confidence"