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You are leaving the universe in which you exist and enter a universe where your actions mean that you will not exist. No problem. The original universe is not altered. However, this does mean that there actually is no true time travel. There is only travel between alternative universes, where you can enter the alternative universe at a random point in time. Does this already falsify the premise? I expect so. But the simpler move is then to forget the alternative universes and just deny that there can be time travel. The paradox is resolved, without all the paradoxes inherent in the theory of multiple universes itself.
originally posted by: iknowyou
Define time travel. I don't think everyone's on the same page here.
Like @AtomicKangaroo said, time is just a from of measurement. It measures progress. Saying something is traveling back in time is like saying that something measures in negative centimeters.
Even if we set aside all the technical impossibilities, multi dimensional world and time travel logically cancel each other out.
You are leaving the universe in which you exist and enter a universe where your actions mean that you will not exist. No problem. The original universe is not altered. However, this does mean that there actually is no true time travel. There is only travel between alternative universes, where you can enter the alternative universe at a random point in time. Does this already falsify the premise? I expect so. But the simpler move is then to forget the alternative universes and just deny that there can be time travel. The paradox is resolved, without all the paradoxes inherent in the theory of multiple universes itself.
originally posted by: play4keeps
a reply to: TheKestrel04
www.google.com...
it’s one thing to consider astral projection and consciousness using Bells Theorem or signal non locality and another to physical manipulate space time. You need the the propulsion system to create a mini black hole. The point is there are more dimensions than four and all evidence points to cognizance of time manipulation.
originally posted by: AtomicKangaroo
My only real issue with this theory is I'm convinced time travel isn't possible at all.
Time is just a form of measurement, like centimetres or liters. It's a measurement of movement or motion, time itself isn't really a thing.
The you have the problem of if 'time' is real (in the way most people seem to think of it), and a thing that can be manipulated, you'd also have ensure manipulation of the main component of time, movement.
If you went back just in time, like only 2000's years ago or even an hour ago you'd probably appear in empty space as the Earth would not be in the same position it is now, heck the whole Solar System wouldn't be where it is now.
You would need a machine a bit like Doctor Who's Tardis. Something that moves in both 'time' and space.
Otherwise you'd need your time machine to indeed be on some kind of space craft that could travel great distances.
Travel in time while in Space, hope nothing is occupying the space you materialise in, then you'd have to fly to your intended location.
But yeah I used to love thinking about time travel and wished it existed, but as I've gotten older I think the only time travel we are capable of is the time travel we do every day which is travelling to the future. Which you could supposedly accelerate with faster than light travel, but even then you'd still face the problem of everything moving on and not being where it is now.
tl;dr before time travelling make sure you have your star charts handy and enough snacks for the trip.
originally posted by: penroc3
a reply to: TheKestrel04
Donny Darko is that you
originally posted by: Specimen88
I'm inclined to think of time an space very much to that of an inverted ocean of sorts, an what ever, can just jump in an out of different currents or streams.
Why I say inverted, is because in space there is no up or down, an to get into a current would need light speed, which is said to need infinite amounts of energy to do. I'd like to think black holes are largely interconnected.
Do rivers goes into the seas, or do the seas flow into the river paradox, while earth possibly having large amounts of water flowing it bowels. Thing is, we could be the bottom feeders, and they don't want to get caught in an undertoe or pressure at deeper depths.