If we could get clear about what the answer to that metaphysical question the key to personal identity we'd at least know what we needed to find out to answer the question: ? Is this one person or two?

如果我们能知道,那个形而上问题的答案,对于人格同一性的关键,至少我们会知道,我们要知道什么来得出答案：,是同一个人还是两个人？

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