I liked the conversation but when the student questions about the professor's brain it just sounds stupid because a simple MRI could prove that he has a brain. So if the professor brings a CT scan or a MRI scan of his brain, will the student get convinced that his professor has a brain? If that is enough to convince him than he should is supposed to trust his teacher's lecture....

Bottomline although the conversation was entertaining the student's logic is full of SHITE.....