a. The "trolley problem" is a famous ethical puzzle created by Philippa Foot: You are the conductor of a trolley (or subway or streetcar or train) that is heading out of control down a track.

Five innocent people are tied to the track ahead of you: If you run over them, they will surely die. If you push a lever on your trolley, it will shift onto another track, where one unfortunate person is tied up. Either you let five people die or you choose to kill one person:

Those are your only choices. Which will you choose and why? Which ethical view from this chapter best fits your reasoning? (If you Google "trolley problem," you will find many other interesting ethical dilemmas to debate with your friends.)

b. Another ethical dilemma sounds quite different: You are a medical doctor trying to find five organ donors to save the lives of five innocent people.

A new patient comes in for a checkup, and you find that this patient has five organs exactly compatible with the five innocent people. Do you kill the one innocent patient to save the lives of five innocents?

Suppose you will never get caught: Perhaps you live in a country where people don't care about such things. Is this the same dilemma? Is it the same dilemma from a utilitarian perspective?