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by Mike Gray
A popular science fiction trope in books and movies is time travel, which always assume it to be feasible; but, according to Dr. Carl Wieland, time travel defies logic:
By way of aside, secular theorists have long been tantalized by the notion of whether time travel could ever be possible. The only way out of this logical paradox issue for them has been to fall back on the ‘multiverse’ interpretation of quantum mechanics (QM)—the bizarre notion that there exists an infinite variety of alternative universes, such that every other alternative that can happen does happen somewhere. …. Consider this: if you could travel into the past, you could be driving a car that ran over one of your ancestors before he/she had reproduced, and thus you would never have existed, so could not have travelled into the past to kill that ancestor. So it would appear that for us to fret about the moral implications of this may be as pointless as speculating about whether it is immoral for a spinster to divorce.
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Resources:
Several time travel films: Somewhere in Time - Time After Time - The Time Machine.
Several time travel books: The Best Time Travel Stories of the 20th Century - Time Travel in Einstein’s Universe - Time Travel: A Writer’s Guide to the Real Science of Plausible Time Travel.
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