" The point of all this is not so that the copper in question can learn more about your motivations and beliefs. They lack such psychoanalytic curiosity. That's why they're traffic policemen. By making you answer a question to which they already know the answer, they are asserting their authority, and belittling yours. That's also why they're traffic policemen. "

― Mark Forsyth , The Elements of Eloquence: How to Turn the Perfect English Phrase