Is (theoretical) timetravel possible without automatically creating a paradox?

[RagnaToad]

[...]considering that with quantum theory, all parallel universes, past, present, and future, exist at exactly the same moment in time.

That is exactly what I believe not to be true

I see your point though. The problem with discussing about this subject, is that the discussion already begins at the basics on which theories should be based. There is no proof for certain basic rules, like paradoxes making one possible world disappear, or the "timeline" splitting up, which makes it even harder to convince someone of your idea, when there are no general facts from which you can work everything out.

Since it's all hypothetical and all

[HUNK]

So here's what im thinking.

If we could theoreticly timetravel, then I dont think we could do that without creating a paradox. To not create a paradox you would have to stay compleatly annonomos to everyone and everything. I think if someone in the past knew you then it would, at that point in time, screw up everything that is going to be related to you and your family(a.k.a, your ancestors).

Here is somthing, what if you went to the past...and died. What do you think would happen? Would you simply die there and seem to everyone in your time that you just dissapeared? Or would you mess up the rest of the world in your time? Would it effect the time you are in or just your time?

Due to how little can be proven, im pretty sure its safe to say its an answere to a question we should not yet ask.

However I dont accually look up and information or anything so I really am just speaking of what I know, which is not that much

[RagnaToad]

If we could theoreticly timetravel, then I dont think we could do that without creating a paradox. To not create a paradox you would have to stay compleatly annonomos to everyone and everything.

Indeed. That's why I named this thread this way.

Although you should think about at what point the paradox would be established. Is it only when you meet someone that plays a role in your life? I believe it would automatically be created, because any small thing that changes, would make you a "different" person, even though nothing would be actually different, if you know what I mean. It's not because a person is the same in a world were some unknown guy fell off a tower, that he is the same person, you see? Since there would suddenly be a world where a guy fell off a tower, including a "you", right?
But the from what world are you?

The present splitting up in 2 presents seems to be giving me the least headaches at the moment, so I'm going with that right now .

But then there is no purpose of going to the past in order to change something. Plus, it's not hard to imagine you disappearing, cause from where would you have come, right? Since the future of the past you have changed (= alternative present created) is totally different from your present... So your either stuck in another world (umm... what?) or you just vanish, cause you don' exist anymore. (But then who made the changes? ---> paradox. yeah ^_^)

[Clint]

So your either stuck in another world (umm... what?) or you just vanish, cause you don' exist anymore. (But then who made the changes? ---> paradox. yeah ^_^)

I realize that it doesn't matter what theories any of us throw out there concerning time travel and paradoxes, because in the end, everything is just really confusing. I would just like to add to that confusion a little bit.

It's impossible for somebody to just vanish, even if they don't technically exist any more in that one timeline, because the person already exists. That was probably the thinking when the time travel part of quantum theory was being established, because if a person doesn't exist in a certain timeline, yet still exists, doesn't that mean that there has to be another timeline in which that person does exists?