Dog: If a dog barks his head off in the forest and no human hears him, is he still a bad dog?
Child's quote: We do not raise silk worms in the United States, because we get our silk from rayon. He is a larger worm and gives more silk.
Pun: It was one week before finals at the University of California at Berkeley, and everyone in my Comparative Religions class was frantic because of all the complex words and ideas we needed to know. The professor had just finished reviewing an Eastern concept he identified as Taoist, when a frazzled student protested, "But you said that was a Buddhist belief!" The professor looked up with a smirk and said, "I'm afraid not. You see that was Zen. This is Tao."