Once upon a time, there was a tavern. Travelers and hunters would exchange silver ingots for copper coins and eat some food there. The tavern keeper and his wife were very greedy. They always played tricks on the scales and cheated their customers. One day they played a trick on an old man as usuaL They were so happy. They thought they made a big fortune. Th their surprise, a young man in the tavern began snickering. "It looks like you've been cheated this time." He told them that the silver ingots had lead in them. The old man was a con artist in fake silver for years. How could it be this way? A smart money changer ilke the tavern keeper was outwitted by an old man!