A strange man was seated next to a little girl on an airplane when the stranger turned to her and said, "Let's talk. I've heard that flights go quicker if you strike up a conversation with a fellow passenger." The little girl, who had just opened her book, closed it slowly and said to the stranger, "What would you like to talk about?'' "Oh, I don't know", said the stranger. "How about nuclear power?'' "OK", she said. "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 stuff, grass. Yet a deer excretes little pellets, while a cow turns out a flat patty, and a horse produces clumps of dried grass. Why do you suppose that is?" The stranger thinks about it and says, "Hmmm, I have no idea." To which the little girl replies, "Do you really feel qualified to discuss nuclear power when you don't know ****?"