Parfit and the Selves That Matter
Suppose you’re on your daily commute to Mars. You’re about to get beamed up, but something goes wrong—the transporter makes a copy of you on Mars, like it’s supposed to, but it forgets to vaporize you back home. So now there are two of you. And if there are two of you, the question is which one is the real you—the you on Earth, or the you on Mars?
