You wouldn't cease to exist because you've already lived your life (existed) until that moment.
Is time travel possible based on theory?
- Thread starter Saint
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Time-travel is achieved by creating something that exists forever (for all eternity.) To travel into the past, you can only remember. To physically travel into the past you must create something that will remain forever. By creating something yourself, then you are doing it. If you should create something that doesn't transport you into the past, then it is false. It may seem true in the present, but it will be disproven someday. Time-travel isn't that difficult: tell the truth; a truth that will remain true forever. 
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I think wormholes (Einstein-Rosen bridge) would theoretically allow time travel into the past, and is allowable under GR. The issue would be in creating one that could be traversed. You’d build the two ends then effectively drag one forward in time relative to the anchored end by accelerating it close to C.
So one end would be at the “now” and the other end might be decades, centuries, millennia in the future. But in doing this you could never create a bridge that goes back in time beyond the bridge’s creation. And since the ends aren’t fixed in time they move forward at the local rate (i.e. 1 day per day while stationary).
So the only way we could use such a bridge to travel into the past is if someone from our past was currently in the process of a relativistic flight from our past and eventually lands some many years after he took off while only travelling from his own relative perspective a few years etc. Since I can’t see Dickens et al having done that, or even HG Wells, I think it’s safe to say that we can’t (yet) travel into the past with such a device.
But it is a theoretical approach to the idea of time travel into the past.
So one end would be at the “now” and the other end might be decades, centuries, millennia in the future. But in doing this you could never create a bridge that goes back in time beyond the bridge’s creation. And since the ends aren’t fixed in time they move forward at the local rate (i.e. 1 day per day while stationary).
So the only way we could use such a bridge to travel into the past is if someone from our past was currently in the process of a relativistic flight from our past and eventually lands some many years after he took off while only travelling from his own relative perspective a few years etc. Since I can’t see Dickens et al having done that, or even HG Wells, I think it’s safe to say that we can’t (yet) travel into the past with such a device.
But it is a theoretical approach to the idea of time travel into the past.
I've told you how to time-travel: create something that remains forever. I know this because I've done it (and so have others.) Are you going to do it or try and develop science-fictional ways to travel into the past? As I've already stated, foreverness is the only way to traverse into the past, although there are an infinite number of ways to do it.
Certainly the future, but as for the past... Extremely difficult. Even archailects that had been self-engineering themselves for millions of years might not achieve the technological sophistication and potential vast scale typically assumed to be necessary for the feat.
In the GBU model, everyone in the past (including a time traveler) would arguably be equivalent to philosophical zombies. That's because "this now" has privileged status in GBU just as it does in the presentism model. If people in the substantively existing part of the "block" (past) were experiencing that sequence of different states the same as those in the current ephemeral state (of added being slash moment), then the latter lose would lose its special status.
In presentism, time travel wouldn't be possible since existence is ephemeral, consisting of a mere yoctosecond or less (whatever the shortest interval is for certain subatomic changes). Or an immensely "larger" and erratically measured microseconds duration if using the common solipsist alternative of recruiting one's own subjective, specious human "now" as the standard for the "present".
Can we change history so that the present and future will be changed too?
Time travel simulation experiments supposedly reinforce the idea that time travel into the past would have to result in consistency being maintained. Whether its via preventing a chrononaut from a successful journey if s/he could change history, or the latter actually contributing to the state of affairs as they conventionally are, or inducing a separate timeline caused by the changes (which would actually already co-exist to begin with).
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Nobody knows. There's no good evidence that any God exists, let along what he, she or it determines.
What does "transcend time" mean, anyway?
Currently reading
TheUniverse as it really is Earth Space Matter and Time by
Thomas R Scott with the assistance of James Lawrence Powell
and a small extract from the book states
.....the laws of mechanics are symmetrical with regard to time, working just as well if time is represented as t or -t: forward or backward. Yet experience teaches otherwise.
Further down the page
... not mechanics but the second law of thermodynamics that implies time's arrow
Hope this helps
Michael345. We are without evidence of God. Does that mean He doesn't exist?
Faith is with respect to the future.
Where is the evidence for love, Michael345? It cannot be measured, yet it exists.
...although I suppose Marriage is evidence of love...
yet it exists.Where is the evidence for love, Michael345? It cannot be measured, yet it exists.
Negatory
Double Negatory
What of regret, Michael345? Wishing to undo something we've done?
All emotions have no existence, due to being feelings experienced within the confines of thoughts and not present as detectible stuff outside of the mindWhat of regret, Michael345? Wishing to undo something we've done?
So you're saying because they're undetectable, they don't exist?
Correct
You might be getting the hang of this
Something is noticed
What caused that?
Investigate
Find the cause
It, what ever it is, exist
Something not noticed
Nothing caused
Nothing investigated
No cause to find
It, what ever it wasn't, does not exist
There are tweaks to apply but that is the basic idea
I disagree, Michael345. Just because something cannot be detected, does not mean it doesn't exist.
Is time-travel possible using savepoints in a computer game? For example, in Resident Evil you use type-writer ribbons to save your games. Would it be possible to somehow save a game PREVIOUS to a saved game?