A stranger was seated next to a girl on the airplane when the stranger turned to her and said, "Let's talk... I've heard that flights to quicker if you strike up a conversation with your 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?" as he smiled.

"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, visibly surprised by the little girl's intelligence, thinks about it and says, "Hrmm, I have no idea."

To which the little girl replies, "Do you really feel qualified to discuss nuclear power when you don't know sh*t?"