Description: `And how do you know that you're mad?'
`To begin with,' said the Cat, `a dog's not mad. You grant that?'
`I suppose so,' said Alice.
`Well, then,' the Cat went on, `you see, a dog growls when it's angry, and wags its tail when it's pleased. Now I growl when I'm pleased, and wag my tail when I'm angry. Therefore I'm mad.'"