Alice didn't think that proved it at all; however, she went on
`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