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Schema

Well-Known Member
#1
How can time travel exist in a deterministic universe? I don't imagine it can. ok. so lets say time travel is only possible in a non-deterministic universe. What does that tell us? That 1 + 1 might not be equal to 3. So that makes sense. But does time make sense it this setting? No, because time is the casuality chain of choice, time will have no meaning in a non-detministic universe universe.
 

seitora

Well-Known Member
#3
Time to put the booze away laddie
 

Zetas

Lurking upon the deep
#4
The only way i can see time travel being possible in any universe is if the very concept of time is literally written into the fabric of reality as a literal law of how that universe functions, i.e. time is completely constant everywhere and in every situation.
 

akun50

Well-Known Member
#5
I probably shouldn't, but here's how I figure time travel works:

You and your timeline are like branch on a tree. Like a branch, you can grow backwards, twisted, etc, but you can never undo what you've already done. For this metaphor, you're part of a breed of tree that can't go full retard and grow back into itself, so while you can get close, you aren't affecting your own timeline. At the absolute most, you're just affecting one very similar to your own.

TL: DR; You can't time travel, you're just dimension hopping and fucking up a different but very similar timeline.
 

Shirotsume

Not The Goddamn @dmin
#6
I've always liked the idea that timelines seperate and merge and crash all the time. You're not changing time, you're just branching into another tributrary that happens to be exactly like the one you were in.

Makes sense too- Bernstein Bears vs Berenstein Bears was just the result of two timestreams merging back together and a few little things not quite coming back together.
 

ThreadWeaver

Beware of Dog. Cat not trustworthy either.
#7
I follow the "There's a universe created for every decision" type of idea. Basically a mashup of Akun's and Shirotsume's explanation. A branch is created for every possibility. They sometimes re-merge and that gives us episodes of Deja-vu. That would mean that when you travel back down the time tree and decide to visit, you're essentially creating a new universe that now has a time traveler in it, differing from its original. The original goes on without you and you go on in this new universe. It also annihilates the grandfather paradox since you're killing the grandfather of THIS NEW universe's you, not yours. It makes forward time travel exceedingly difficult because you wouldn't know which branch path to follow to get to where you want to go, since you haven't experienced them, and doing so creates a new universe. Basically a Schrodinger's cat kind of thing.
 

Schema

Well-Known Member
#8
The idea that a universe would/could be created based off of people choices feels a bit egocentric & contradictory.

Like, I refuse to believe there is a universe where all things leading up to this decision was the same, but instead I decided to vote for Trump. There is nothing that could of wiggled or wobbled that would have that choice to be a valid one. And with that, it becomes a question of "When can a decision split the universe?" And most importantly, "Biologically given identical states why would one set of nerves fire in one universe and not in another?" At one point that goes down the quantum mechanics rabbit hole, at which point I'd try to defer it with micro != macro, and variants of quantum behavior normalize out to predictable macro behavior, except in cases of quantum amplification. In fact a universe branching out due to this is one of the rare situations I would say that yes, a universe could be created, IE if some amplified signal is in a certain range do X otherwise do Y.

Even that is dependent on universes dividing/merging without spending energy. Where does this energy that powers the forking universe come from or maintained?
 
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