It was a rule of the club that anyone asking a question which he himself could not answer must pay a fine. One of the members presented a question as to why a ground-squirrel in digging left no dirt around the entrance to its hole. He was finally called on for the answer, and explained that of course the squirrel began at the bottom and dug upward.
"Excellent!" a listener laughed. "But how does the squirrel manage to reach the bottom?"
"That," said the other with a grin, "is your question."