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Originally Posted by JustDisGuy
Okay, so that seemed like a pretty intelligent and potentially correct model of time and why it might be impossible (sorry - my world, 'nothing' is impossible, merely varying degrees of improbable) to physically travel through time at other than a constant forward rate.
I'm curious about your thoughts on the idea of being able to perceive events in 'other-time', and by extension of that possibility, the potential of being perceived by others who are "currently experiencing" (perhaps more accurately stated as intrinsically linked to) that event in 'other-time'. If matter or our physical being cannot penetrate the time barrier, perhaps our consciousness can?
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Everything we do and everything we are, even the way we think, is all physical. Our mental thoughts are electric impulses in our brain. Matter and energy are involved in the way we think, so, you could, relate that to relativity, and say that no, our consciousness cannot travel through time. Our brain is quite complex, however. That's a whole other topic that I don't really know much about, and would end up leading into some type of artificial intelligence topic, which in my mind is impossible to achieve, without using some type of biological matter.
Either way, it all relates to relativity, which is the basis of my whole argument.
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Originally Posted by Pfhorte
Hmm, well, imagining time as a line is just something humans make up to help visualize a concept. It is NOT that concept. So conclusions made based on that concept are flawed.
Thinking of time as flowing etc does not mean time works that way.
There is no way to travel backwards in time because backwards does not apply to time. You can obviously travel forward in time, since that is what currently happens to everything.
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Like I said earlier, traveling backwards in time would seem more plausible, given the physics of how light works, and how relativity works.
Every object is moving 'forward' in time. In other words, every object in the universe is moving along the same directional path that time is. I say that in general cases, since things like black holes may have different results.
We can move at the fastest rate of time by standing still compared to the expansion of the universe. That is impossible to do, unless you are at the very centre of the universe, or if you are accelerating towards the centre of the universe at the rate of expansion.
Now, think about the way time dilation works, which says that your time slows down as you move faster. If you reach the speed of light, you reach the rate of time being 0. Your time isn't moving at all, compared to everything around you. You do not age at all. What happens when you exceed the speed of light? Chances are that you would start going backwards in time.
How do you make it so you go forward in time?
The only two ways I can think of are, 1, you go slower than speed 0, or two, you move towards the big bang, or the centre of the universe, at a rate greater than the expansion rate of the universe.
Case number 2 seems less plausible, since time is moving in one direction, and can not be changed, because everything else around you would be expanding anyway. Case one seems to be the only plausible way that you could possibly move forward in time.
Therefore, it would seem to be impossible to move either forward or backward in time, but more plausible to move backward in time.
The fact that you said that time is moving forward, and thus it would seem more plausible to move forward further, since it's already moving forward, is a very good assumption, since time can be easily manipulated in it’s forward direction, but can not be exceeded very easily. Time can be manipulated to slow down for yourself, so therefore it would seem more plausible to be able to go into the past, in regards to moving through time.
However, either way is impossible, given todays physics, because no object with a mass can exceed the speed of light, proven with relativity, and no object can have a negative speed.