Presentism and Eternalism: Two Philosophical Theories About Time[1]
現時論與永恆論:兩種有關時間的哲學理論
Presentism is a theory in philosophy which says that the only events and objects which exist are those that exist in the present. So, only things which exist now, right now, really exist. It is a theory which focuses on the temporal present; that is, things existing in the present moment. It is not a theory concerned with whether things exist somewhere else. So long as that object or event which is spatially distant from us exists in the present moment, then it exists. If we were to make a list of all the things that a Presentist believes exists and does not exist; in the list of things that do exist we would have: the Grand Canyon and the Taj Mahal; whereas in the list of things that do not exist we would have: Socrates and tomorrow’s events.
現時論認為只有存在在現在的人事物才是唯一存在著的。所以,只有存在在現在(此時此刻)的東西才是真實存在的。這個理論的重點是時間上的當下,也就是存在在此刻的東西。這個理論不討論事物是否存在在其他地方。無論空間上與我們距離遙不遙遠,只要那個事或物存在在此刻,那它就存在。如果要把所有現時論者認為存在以及不存在的東西都分別列出來的話,那麼,出現在存在表上的就會有:大峽谷和泰姬瑪哈陵;而出現在不存在表上的則會有:蘇格拉底和明天要做的事。
The philosopher Ted Sider says, “Presentism is the doctrine that only the present is real… A presentist thinks that everything is present; more generally, that, necessarily, it is always true that everything is (then) present.” With this definition, the past and future do not exist – they are not real! That is why Presentism is so mind-boggling because we are constantly thinking about the past and planning for the future. But according to this theory, the past and future only exist subjectively – it is only the present which exists objectively (outside of our minds). Also, if we take a statement like “Newton exists”, then this statement could only be true if it was said when Newton existed in the present, say in 1666. If we say that statement now, then it is false. When making statements about what exists, the truth of the statement depends on the context (when the statement was made).