“it’s a fun fiction which is always contradictory in some way” <-- that is not true.
General relativity allows for closed time-like curves and the existence of those means time travel isn’t necessarily impossible, and if that is the case, it has to abide by the Novikov self-consistency principle.
Willfull ignorance wastes only your own time.
3volver@lemmy.world 8 months ago
In that case time travel would be meaningless regardless, impossible to prove, and doesn’t matter.
Dasus@lemmy.world 8 months ago
Dumbledore disagrees. The type of timetravel that happens in HP: Prisoner of Azkaban is self-consistent. Same as with Rick’s timetravel in the snake episode of Rick & Morty (specifically excluding the snake time travel, which is an example of non-consistency, leading to endless paradoxes).
Now ofc having a timeturner and/or a timemachine would be the impossible part there, but again, CTC’s are technically allowed by GR.