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Is time travel going to be possible?
in Technology
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And backwards time travelling seems very unlikely, as someone once said we'd be having tourists from the future if backwards time travelling was possible (even if it was outlawed). So if backwards time travelling isn't possible, technology for future travel doesn't seem very likely. I feel very comfortable with my theory that time travel won't exist, excluding going into hyper sleep.
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Even if we give humanity 500 years, I think the closest to travelling in time would be hyper sleep, which I don't count as time travelling exactly; as I'd imagine time travel is sending particles through time. Maybe teleportation could be found, but time travelling is just seemingly hard. Convince me that I'm wrong.
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1) space worm holes that allow travel much faster than speed of light, essentially bending time and space continuum.
2) time space anomalies that create disruptiion in the dimension, either a parallel universe or time travel. It is not well controlled, but it is conceivable that technology can be developed to create such an effect.
3) alien technology that can transport much faster than speed of light at warp speed. If we can travel much faster than speed of light than we start getting into weird issues like seeing the past from far away as light reflects.
you claim that no one traveled here from the future. We cannot assert such claim, as we just wouldn't know.
all I am saying that we don't know enough to claim that time travel is impossible. 100 years ago many things that are available today sounded completely insane.
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1) This is definitely a theory I've heard, but it would be difficult to find one, let alone control one. And if backwards time travel did exist like this, is the government hiding the tourists? And the technology used to contain this? Just seems incredibly overwhelming thinking about how much energy is inside of this wormhole.
2) This also seems complicated. While it's possible, it would be difficult to discover how to contain this energy and use it in a doorway.
3) That assumes 1) Alien life exists, 2) Alien life has highly advanced technology, and 3) That technology goes through time via going hyperspeed.
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If you accept the concept of linear time, one event leads to the next which leads to the next etc. Then anything that you did in past with time travel already happened at the time that you went back to do it. Say if you went back in time to kill Hitler. with linear time, if you go back you did whatever you do in the past which means it's already happened. So you know you're going to fail. But if that keeps you from going back then you never tried but if you do you are going to fail. Or say you can change the past, and you go back and kill Hitler. That means he never comes to power which means there's no WWII or a holocaust. Which means that you have to reason to go back. so you don't. But if you don't, Hitler comes to power. so you do. and because you did you didn't and because you didn't you did. Then you're trapped in an infinite logic loop. Then, what if there are multiple branching timelines and every decision makes a new timeline. How do you know that you changed the timeline that you originally came from and didn't just trap yourself in the new one. Then there's the butterfly effect and we all know how that could go.
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Yes, we travel through time, when your velocity is different relative to those standing still.
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Backwards time travel is only possible with alternate dimensions realities, or alternate timelines, otherwise there would be logical paradoxes like killing your father before you were born...
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@Nope
No. Logical paradoxes cannot exist in reality, only in thoughts and conversations.
If I go back in time, I will have the ability to prevent my own birth. This is a situation that cannot exist because it is a paradox.
1. It's possible for my birth to be prevented
2. My birth already happened.
These to premises cannot exist in the same universe.
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What forces me to do or not do certain things?
If i travel back to before i was born, what prevents me from killing my father?
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@Nope
I don't think you understand what I'm saying. Even if I don't want to kill my father, backwards time travel within the same universe / timeline, creates the possibility of a paradox. The universe doesn't allow for this.
Gravity doesn't work because we all agree to obey it. It's not voluntary, it's a fundamental property of the universe. Just like how the universe isn't some God figure saying, "ok you can use that time machine, just promise you won't cause any paradoxes".
You're implying that there would be some force that literally prevents me from making the decision to cause a paradox and also prevents me, or anyone from accidentally doing so. I don't know what that could be.
...
Thinking on this a little more, trying to see your point... You're saying that the fact that I exist to go back in time implies that for whatever reason, we know that I will either fail or decide not to kill my father. We know this like we know all historical events. But that is a very fatalist viewpoint. That means that the future is already "written"; all events are already set on a path that cannot be diverged from.
It's hard to grasp the concept of future events being in a state of "already happened". Perhaps it's just a semantic issue though...
Still, I'm not convinced. There's no theory that I've ever heard of that would allow for backwards travel like there are for forwards travel.
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@Nope
It think we need to make an important distinction between a lack of free will and fatalism.
Fatalism is the idea that the future is already determined, and there is no possibility to diverge from that course.
A lack of free will simply means that we are not the authors of our thoughts and decisions. They arise in consciousness due to genetic, environmental, and random causes in our brains.
You can have a predetermined future while still having free will. It's just that there is a record, somewhere or somehow, of which choices you will freely make.
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