A train is running out of control down a track. In its path are five people who have been tied to the track by a mad philosopher. Fortunately, you could flip a switch, which will lead the train down a different track to safety. Unfortunately, there is a single person tied to that track. Should you flip the switch or do nothing?
2. The Friend
A friend confides to you that he has committed a particular crime and you promise never to tell. Discovering that an innocent person has been accused of the crime, you plead with your friend to give himself up. He refuses and reminds you of your promise. What should you do? In general, under what conditions should promises be broken?