A woman waved to a man in a taxi. She got into the taxi and told the taxi driver where to take her. He nodded to her and drove. The woman talked a lot and that annoyed the taxi driver. The taxi driver said,' Ma'am, I can't hear what you are saying! I am as deaf as a post!' The woman stopped talking for the rest of the ride. Once she got out of the taxi, she realized he was lying. How did she know? -Riddles