this post was submitted on 17 Jul 2023
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You can never change history even if you can time travel. How did you manage to kill your own grandpa before you were born again?
You do relize there are like five different types of time travel. You could just as easily pull a future Trunks as you could a Marty McFly.
I... I need to know the different types of time travel.
There's really only 2 not 5. Most are just variants of the two:
Sometimes movies just ignore paradoxes or logical fallacies because it makes for better screen time. But really all time travel is one of the two.
Primer is 1.
MCU is 2. (Endgame pretends to be 1 but really with the series Loki it's clear it's 2)
Predestination is 1.
The series Dark is actually a weird mix of the two. First it's 1. And then morphs into 2.
Triangle is 1.
Rick and Morty is 2.
There is also type 3, called a closed timelike curve or Lorenzian manifold. Aka a Djinn: a loop in causality where the original cause depends on the final effect. It exists outside of linear time and yet is not a separate timeline or "-verse" in the multiverse.
That's a variation of a singleton universe timeline.
A singleton universe doesn't allow for multiple versions of a single moment to coexist. A closed timelike curve does, and potentially an infinite number of variations all as long as they are continuous in the same curve. It's also different from a proper many worlds theory with quantum variations. The relationship between causes and effects are mapped differently. Thus it's its own thing.
Closed loop, meaning you cant change anything cause it already happened. You time traveling was already written.
Back to the future, you can change things just be careful and dont accisently erase yourself through the butterfly effect.
We'll call this one reverse flash, not only can you change things but you can litterally kill your parents because you are disconnected from the timestream. (Not exclusive to number 2)
Future Trunks, congrats you just created a new timeline. You cannot change your future, have fun.
Alternate dimension, you just went to an alternate dimension that looks like your past. Dont let the British museum find out.
Theirs zero different types of time travel
I meant in fiction pedant. And there is one type of time travel, forward.
Ooh, the uberpedant. That's a rare one
Theres five or four of us!
And I love you all
...because of time travel?