this post was submitted on 06 Sep 2023
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Can always travel into the future. Regardless of your state, you are always traveling into the future at exactly 1 second pre second.
I would fully agree into the past is impossible. Thus three reason FTL is not possible. But if your going suggest it is possible, why not instantaneous travel? Might as well make it as fast as you want.
Yes but as I said, regardless of the method you do to get around the laws of physics, be it bending space or some other novel idea, it still results in the ability to time travel into the past. It creates situations where you can get information before it happens. In a way it places you in two time frames at the same time which is nonsensical. You could send information back to the source before it happened. That is the key point and it breaks causality even if you do it on such a way where you did not actually move. Ie. Wormholes.
This video is really good. About half way thru it shows that it is not so much the movement but that you arrived somewhere before information could have arrived.
https://interestingengineering.com/video/faster-than-light-travel-paradoxes
It doesn't matter if you are moving or bending something and you don't need to achieve any real velocity. The sources I provided explain why that doesn't factor. It is simply you are arriving somewhere faster then that is light thru normal space and that alone will allow for time travel to the past.
People seem to have this concept that if you don't have to move but can just transport, then it will not break causality. That is not the case.