A stranger was seated next to little Tommy on the plane when the stranger turned to the little boy and said "Let's talk. I heard that flights will go quicker if you strike up a conversation with your fellow passengers. Little Tommy, who had just opened his book, closed it slowly and said to the stranger "What would you like to discuss?" "Oh, I don't know," said the stranger, "how about nuclear power?"
"OK," said Tommy, "that could be an interesting topic, but let me ask you a question first. A horse, a cow, and a deer all eat the same grass yet the deer excretes little pellets, while the cow turns out a flat patty, and a horse produces clumps of dried
grass. Why do you suppose that is?" "Jeez," said the stranger. "I have no idea."
"Well then," said little Tommy, "How is it that you feel qualified
to discuss nuclear power when you don't know shit?