You need a substance and then that substance has to have a property that changes depending on the heat flow, i.e., depending on whether it's sensing that it's the same temperature or different temperature than something else.

你需要某种物质,它的某种性质,随着热量的流动而改变，也就是说,依赖于它是否感觉到它,与其他的物体处于相同的温度。

麻省理工公开课 - 热力学与动力学课程节选

How can whether or not I am the same guy as the guy who was lecturing to you on Tuesday depend on what's happening in Pennsylvania or Australia or Mars?

我跟星期二给你们讲课的人,是否为同一人这个问题,怎么能取决于在宾州或澳州或火星发生的事情？

耶鲁公开课 - 死亡课程节选

What you wanted--at least what I want, I invite you to ask yourself whether you want the same thing-- what I want is not just survival, but survival with the same personality.

你想要的，至少我想要的，你们也问问自己你们是不是想要这个-,我想要的不仅仅是存活，而是带有同样的人格存活。

耶鲁公开课 - 死亡课程节选

Maybe there is a difference there, I don't have a good theory as to what the difference is, since I don't have a good theory to what the difference is, I'm not in a good position to decide whether a reassembled body would be ? the same body or different body?

也许这两个案例是有不同，我没有充分的理论来,解释这两者之间的不同,由于我无法解释两者的不同，我也就无法去下结论,究竟重组的肉体,是原来的肉体还是不一样的肉体？

耶鲁公开课 - 死亡课程节选