Full Idea
If Socrates died, he died either when he lived or when he died; so he was either dead when he was alive, or he was twice dead when he was dead. So he didn't die.
Gist of Idea
Since Socrates either died when he was alive (a contradiction) or died when he was dead (meaningless), he didn't die
Source
Sextus Empiricus (Outlines of Pyrrhonism [c.180], III.111)
Book Reference
Sextus Empiricus: 'Outlines of Pyrrhonism', ed/tr. Bury,R.G. [Prometheus 1990], p.226
A Reaction
One of my favourites. Of all the mysteries facing us, the one that boggles me most is how anything can happen in the 'present' moment, if the present is just the overlap point between past and future.
Related Idea
Idea 22742 Socrates either dies when he exists (before his death) or when he doesn't (after his death) [Sext.Empiricus]