Descartes walked into a bar.
The bartender said, "Beer, buddy?"
Descartes said, "I think not."
And he disappeared.
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I think String Theory would make time travel very possible. But everything becomes an alternative...
if that guy was able to go back to see his dad, and let's say he got into a fight the first time, and this time, he decides to be nice. Then, would there be a change of events? Would he then want to go back to see his dad TODAY?
I am reading this book now by Fred Allan Wolf. He raised a good question:
"Did the early universe have a radius? How could it even have one? Because according to quantum picture it wouldn't have had any radius until that radius was measured? who measured it? When was that measurement accomplished? And then, a few physicists have come to a startling conclusion.
It is OUR observations NOW that are determining the past.
he then states that an observation of an event now somehow sends a message backward in time and "causes" events in the past. If this is true, then what is really the past?
It would seem that there is no absolute past, because there is always the possibility at anytime that some present event will alter it."
it continues to state: "A way out of this paradox is found in the parallel universe theory.
In other words, there are parallel pasts---an infinite number of them. The past that is altered by the present is just one of the many.
Since, according to relativity, there is no such thing as absolute present (NOW, LOL) then waht is present for someone could be the past of the future for another. Consequently, it would seem that the future also communicates with the present, but which future?"
OK, while I understand this in concept...does someone want to volunteer and explain what it REALLY means?? LOLOLOL
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Basically, we're buying into concepts. I guess the question is whether our concepts shape the correctness of what we perceive as true. Are there universal truths such as mathematical concepts or have we created the concept that these things are true, proven, and play out universally? Just because we've "verified" some of these things and they have thus far proved correct does not mean that they will hold true throughout the several universes.
For example, we buy into the idea that a piece of paper that we call a "dollar" has value. That it is intrinsically worth something. But the "value" of money is a concept. We place a value on it artificially. It works because we all buy into that concept. It is the same whether our "dollar" is a shell or a coin or a lovely sparkling gem. The concept of "beauty is in the eye of the beholder."
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It is OUR observations NOW that are determining the past.
he then states that an observation of an event now somehow sends a message backward in time and "causes" events in the past. If this is true, then what is really the past?
It would seem that there is no absolute past, because there is always the possibility at anytime that some present event will alter it."
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Or our observations now are explaining the past in a way that's understandable to us based on our perceived reality of "now."
Does this explain how we "discover" new things? Theories? Artifacts?
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it continues to state: "A way out of this paradox is found in the parallel universe theory.
In other words, there are parallel pasts---an infinite number of them. The past that is altered by the present is just one of the many.
Since, according to relativity, there is no such thing as absolute present (NOW, LOL) then waht is present for someone could be the past of the future for another. Consequently, it would seem that the future also communicates with the present, but which future?"
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In theory, we can travel between those parallel universes via wormholes--ok, traversable wormholes. But you have to buy into the idea that they operate simultaneously so that you arrive at the same instant in time as the one you left. That might make the statement above true.
Wormhole:
http://en.wikipedia.org/wiki/Wormhole
It would seem that to alter things, you would have to not only create a wormhole that allowed you to travel between parallel universes but back in time too. I don't know the math, trust me you don't want me adding 1 + 1 without a calculator or fingers, and probably wouldn't be able to do it if you taught me it. But theory is one thing that I can grasp, even vaguely the mathematical concepts too, when explained as Hawking does.
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Since, according to relativity, there is no such thing as absolute present (NOW, LOL) then waht is present for someone could be the past of the future for another. Consequently, it would seem that the future also communicates with the present, but which future?"
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Time is fluid, in other words.
It would seem to me that the answer would have to be "all of them." If there is never an absolute present, then the present that is also the past of the future for someone else (or you in a parallel universe?) would mean that it would be possible that the future could communicate with the present because it WOULD be the past of the future for someone and thus already experienced. This way the past would always be informing the present and the present would always be informing the future which would be the now for someone else currently--in that parallel universe. So if communication between parallel universes is possible, it would be probable that we could experience the future--and the past--simultaneously or at least at different instants consecutively.
Did I lose you yet? I'm not sure I'm understanding what I wrote, but I think it makes sense if you parse it out. But I'm open, very open, to being disproved since theoretically I already have been.
