>>12459120There are 3 ways time travel could coherently work. None of them are paradoxical.
1) Novikov self-consistency, your time travel trip is already a part of history, so it won't create any alternate versions of it. You can't "change the past" (then again that expression is problematic whatever the time travel paradigm, since change already means temporal order), but you can very much *make* the past, in the same way you make the future, it's just that you have better knowledge of what you can't affect, making it feel more limited.
2) Parallel universe style time travel. Whatever you prevented from happening still happened in the universe you came from, this easily eliminates any paradoxes. Because you don't even have to think of it as time travel, it should be easy how there isn't any paradoxes.
3) Resetting the Universe to some previous state. This is the most implausible, since it would require godlike powers from the time traveler, and he would also somehow need to make himself an exception to this reset - otherwise he wouldn't even realize he had time traveled and possibly everything would fold the same exact way again, at least without indeterminism. But basically it's like loading a save file in a video game. The original events between the point in past you travel to, and the point in time you chose to time travel to the past, still did happen, no matter what you're going to do, but unlike in the parallel universe version that version of history doesn't continue anywhere from the point you went to the past. If you just think of it as making the universe look exactly like at some point in past but add yourself there with all your memories before the reversal intact, rather than *really" going to the past, all the paradoxes disappear.
