Both of them are self-contained courses, so you could take either 251 or 252, or you could take both.

两门课都自成一体,你可以在251号和252号中任选一个,或者都选也行

耶鲁公开课 - 金融市场课程节选

Great! The question was--on this saying, what do we say about the case if we take the two halves of Johns' brain, split them, ? put them into 2 different torsels, they both wake up, ? would they both be Johns?

很好！这个问题是，如果把约翰斯的左右半脑分开,分别放进2个不同的躯干，结果会怎么样，它们都醒了，都会是约翰斯吗？

耶鲁公开课 - 死亡课程节选