A college professor was seated next to a young boy, on an airplane. He turned to the boy, and said: "Let's have a discussion."
Boy: "OK, what do you want to talk about?"
Professor (thinking he'll intimidate the kid): "How about Nuclear Power?"
Boy: "Very interesting subject. But, before we begin, I'd like to ask you a question: Horses, cows, and deer all eat grass, yet the horse excretes clumps, the cow excretes flat patties, and the deer excretes pellets. Why is that?"
Professor: "I have no idea."
Boy: "Then, how do you feel qualified to discuss nuclear power, when you don't know shit?"