You've got a million dollars in front of you. You can either spend it for yourself or spend it on a surgery for someone you don't know who is in danger of quadriplegia. You don't know each other. And no one will ever know what a noble deed you've done sacrificing all the money for the surgery for a person you don't know, or how mean you were to take the money confining that person to a wheelchair for the rest of their life. So what would you do? You can't share the money.
在你面前有一百万美金。你可以自己留下或帮一个你不认识的快全身瘫痪的人做手术。他不认识你，你也不认识他。谁都不会知道，你做了一件多伟大的事，把所有的钱都捐给了一个素不相识的人去做手术。当然，你也可以拿走这笔钱，将那个人今生都困在他的床上。你会怎么做呢？这笔钱不可割分。