You and Joe Jones, your neighbor and friend, bought lottery tickets at the corner drugstore. While watching the lottery drawing on TV with you that night, Joe leaped from the couch, waved his lottery ticket, and shouted, ‘‘I've got the winning number!''
Suddenly, he clutched his chest, keeled over, and died on the spot. You are the only living person who knows that Joe, not you, bought the winning ticket.
If you substitute his ticket for yours, no one will know of the switch and you will be $10 million richer. Joe's only living relative is a rich aunt whom he despised. Will you switch his ticket for yours? Explain.