These paradoxes may well keep you up at night!

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17 COMMENTS

    • The most interesting one is the last one, as it connects to our own human body’s process of replacement.

    • David Taylor: These things have a solution in some “types” of time travel. Like the multiverse theory: what if when you time travel, you essentially “create a new universe” where you now live in the time you travelled to, with everything else being as it was at that time in your “original” universe. You could even kill your parents at that point and there’d still be no paradox, because you were born in a different universe. So in that case you could save your friend, and he’d never even know that he would be injured or dead.

    • Alltime10s here’s a question for you: say a time traveller’s friend is injured in an accident. The Traveller goes back in time to save their friend. The question then is: is there evidence that the Traveller went back in time? On the one hand, no: saving their friend eliminated the record of an accident. But on the other hand, yes because the Traveller is the reason there’s no record of an accident occurring. This is an example of what I call “The Problem of Time” which states that time as a concept is both solid and malleable.

  1. The god one is crazy because i used to joke years ago and ask people, “Can God throw himself a surprise birthday party?”
    It’s a mind-fucker

  2. For the last one with the ship, it’s the same situation as for us (human), our cell are constantly dying and our body create new one to replace them. At some point (I think it’s 7 years) every cells of our body had been replaced by new one, so am I the same person as I was in 2004 even having no cell in common with this old me ?

  3. correct me if i’m wrong but the example given for the bootstrap paradox is actually an example of the grandfather paradox while the bootstrap paradox is slightly different focusing…

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