The Purse of Gold
A beggar found a leather purse that someone had dropped in a market place. Opening it, he discovered that it contained 100 pieces of gold. Then he heard a merchant shouted, "A reward! A reaward to the one who find my leather purse!"
"Reward?" scoffed the merchant greedily counting the amount of gold. "The purse I dropped had 200 pieces of gold in it. You've already stolen more than the reward I'll give to you.! Go away or I'll tell you to the police."
"I'm an honest man," said the beggar defiantly. "Let's take this matter to the court!" In the court, the judge patiently listened to both sides of the story and said, "I believe you both. Justice is possible! Merchant, you stated that the purse you lost contained 200 pieces of gold. Well, that's a considerable cost. But the purse the beggar found had only 100 pieces of gold. Therefore, it couldn't be the one you lost."
And, with that, the judge gave the purse and all the golds to the beggar.