忒修斯之船 The Ship of Theseus

思想实验需要的是想象力，而不是感官。

最为古老的思想实验之一。最早出自普鲁塔克的记载。它描述的是一艘可以在海上航行几百年的船，归功于不间断的维修和替换部件。只要一块木板腐烂了，它就会被替换掉，以此类推，直到所有的功能部件都不是最开始的那些了。

问题是，最终产生的这艘船是否还是原来的那艘特修斯之船，还是一艘完全不同的船？如果不是原来的船，那么在什么时候它不再是原来的船了？

哲学家Thomas Hobbes后来对此进来了延伸，如果用特修斯之船上取下来的老部件来重新建造一艘新的船，那么两艘船中哪艘才是真正的特修斯之船？

One of the oldest of all thought experiments is the paradox known as the Ship of Theseus, which originated in the writings of Plutarch. It describes a ship that remained seaworthy for hundreds of years thanks to constant repairs and replacement parts. As soon as one plank became old and rotted, it would be replaced, and so on until every working part of the ship was no longer original to it. The question is whether this end product is still the same Ship of Theseus, or something completely new and different. If it’s not, at what point did it stop being the same ship? The Philosopher Thomas Hobbes would later take the problem even further: if one were to take all the old parts removed from the Ship of Theseus and build a new ship from them, then which of the two vessels is the real Ship of Theseus?

（简妮：从时空的连续性来说，80岁的你和10岁的你当然是同一个人。但多年后，当我们翻出小时候记录的只言片语，或者泛黄的旧照片，会不会觉得有一种疏离感和陌生感，人体从诞生那天起就一刻不停地进行着新陈代谢，就像忒修斯之船，每一块木板甚至连记忆细胞都被新的替换掉了，当初的那个人真的是现在的自己吗？）