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[(somewhat) relevant xkcd](https://xkcd.com/657/)
I’m not thrilled by his assessment of Harry Potter time travel, because that whole thing could have been fucked if the characters just happened to make any other decision because they wanted to, and they just simply didn’t, and it was never revisited.
JK Rowling isn’t a good writer.
Man, the *Haruhi Suzumiya* franchise would probably give this man a migraine.
Unfortunately, the *Lifeline* of the show is not Robert Heinlein’s first published story.
So, let me get this straight: Time travel Harry’s actions bring time travel Harry into existence is logically consistent? Serious question, how? Seems like a contradiction. Time travel Harry exists before he exists, but I’m open minded. What’s the argument for logical consistency here?
This video needs an update with Avengers: Endgame’s take on time travel. I really like that version too, and in some ways it makes the most amount of sense to me. You basically drop a buoy where you are so you know your full position along which timeline, and then you just travel backwards along the thread of your timeline. Once you “arrive”, you can do anything you want, and when you’re ready to go back you just travel backwards a bit before you left, and then shoot back forward at your buoy.
Yea the logically consistent version, isn’t. Plus it is impossible because humans have free will whether or not they jumped in a time machine.
Now do Dark.
The best time travel story is clearly *The Terminator,* and I’m disappointed it’s not in this video.
Skynet sends a Terminator back in time to kill Sarah Connor before she becomes the mother of the person who ultimately defeats Skynet. John Connor sends Kyle Reese back in time to stop the Terminator (and to get with his mom). Kyle Reese knocks up Sarah Connor, and advanced microchips and other parts salvaged from the destroyed Terminator lay the foundation of what will become Skynet.
It’s beautiful, it’s self-contained, and I wish the subsequent movies hadn’t ruined an almost perfect time travel story.
Missing a form of time travel.
[Timeline](https://en.wikipedia.org/wiki/Timeline_(novel))’s parallel universe time travel. Where traveling in time brings you to a completely different universe.
I don’t think I’ve ever seen the words “just makes sense” used while describing the bootstrap paradox before.
Actually, the primer flowchart is wrong. Since there was a failsafe machine, there was only one branching path from the original point where it was turned on.
Does this video cover Homestuck, where the creator set up successful time loops where things happened “in the present” where characters would show up from the future, and later have to travel back in time to “complete the loop”
Probably one of my favorite depictions of time travel to date. A lot of good setup that showed the creator at least partially knew where the story was going.
My favorite time travel was in Futurama where the time travelling duplicate was doomed.
I don’t particularly like time travel stories, as very few time travel systems are capable of being logically consistent.
Any mechanism of time travel where a paradox is even possible (regardless of whether one happens in the story) is not logically consistent.
Groundhog Day: ✔️
Harry Potter: ❌
Back to the Future: ❌ (but this movie is still awesome)
Looper: ❌
Primer: Honestly I don’t know
Some others that don’t work:
Tenet: ❌
Terminator: ❌
Interstellar: ❌
A few that work:
Edge of Tomorrow: ✔️
Timeline by Michael Crichton: ✔️ (I think)
Avengers Endgame: ✔️ (If you go by what the directors, not the writers, say)
There’s really only one form of logically consistent time travel, which is “an entirely new timeline is created when you go back in time”.
No time travel fiction to date that I’m aware of has ever incorporated the earth spinning around the sun into its equation.
The earth is moving around the sun at 67,000 mph.. even if you time traveled a second into the past, you’d be 35km off the ground.. or into the future a second.. and be 35km into the ground.
I like the Loki concept of time travel, you can not change what has already happened, only create another branch in the multiverse and there are infinite multiverses on infinite timelines.
Now do Predestination