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A Problem with TimeTravel
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<i>Originally posted by kao</i>
<br />Time travel is not just implausible, but is logically impossible in physics because it puts the effect before its cause. [See metaresearch.org/cosmology/PhysicsHasItsPrinciples.asp ] So why beat a dead horse? -|Tom|-
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">I agree with Tom, time travel is physically impossible. However, to travel in time does happen, backward or forward. Our mind has the ability to relive the past or anticipate the future. Reading a book, watching a movie or listening to a story takes you to the era of the writer or speaker. I think everyone would like the chance to go back and prevent WW II but, what would be the consequences be; you had better be really sure of what would happen before doing it. Knowing the past should change the future but, changing the past could destroy the future from that point forward. Thank you for your time.
thebobgy
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<br />I don't exactly agree that time travel is logically self-contradictory.
We know from quantum mechanics that in order to determine the probability of an event, you look at all the ways the event can happen and add up the amplitudes of each one.<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
We don't *KNOW* anything from Quantum Mechanics, it's an extremely speculative field at this point. I believe more of it's findings stem from our lack of ability to measure certain things(at least with today's technology), than from truly observed facts. I would say that it's a bit premature to call much of anything from Quantum theory a fact.
Anyway, on the issue of time travel... It is my belief that people are viewing time totally wrongly. Time is not a physical dimension, but instead, I think time is an expressed "dimension" created by the processes of the universe. I suspect that we're still missing some crucial info on what makes one moment progress to the next, but we'll probably figure it out eventually, even if we can only infer it, and never actually test it. Time backward and forward is the same thing I am guessing, because time is a product and not a producer, so to speak. Even "backward" time is one thing leading to another in a logical chain of causation. So if we "reverse" time, I think it'd only be in a limited area, and it would be more a matter that we reverted things in that area to their previous conditions rather than actually having travelled through any sort of dimension.
"Regret can only change the future" -Me
"Every judgment teeters on the brink of error. To claim absolute knowledge is to become monstrous. Knowledge is an unending adventure at the edge of uncertainty." Frank Herbert, Dune 1965
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