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RE: Meet My 10 Time Travelling Death Defying Dinner Guests
It really does, and your thoughts on timetravel are my own. I've been planning a long involved timetravel novel for a long time and kept getting stuck on the paradox of like if you go back in the past and save Lincoln, and I want him dead so I go back and kill you, but you go back before either of those things to intercept me from killing you, and then I go back before any of that. . . The solution is that a world could exist where Lincoln died in a different pair of shoes, but everything not affected by Lincolns choice of shoes is the same, therefore it could still be manipulated by people who knew the history of our own world.
Effecting things on your own timeline, is too troublesome; then you get a Back To The Future situation. Whereby Marty McFly decides to come back 10 minutes early to save Doc.
However he then sees a past version of himself go into the past, and then presumably do all the things he did, to then come back again 10 minutes early to save Doc and see a version of himself do the whole thing again.
So we have to think about causal loops as well as paradoxes! :-D
Cg
I like the Back To The Future reference. In that scenario, it still posits that everything that has happened still happened, as the time traveler would always wind up "resetting" what he did by going back to before he did everything. It feels a bit timey-wimey at first, but when you step back to look at it, it really simplifies things. Everything still happened, it's just that he went back to prevent everything so that for other it would feel it never came to pass. But, it always happened because he remembered it happening.