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<blockquote data-quote="Umbran" data-source="post: 9751267" data-attributes="member: 177">Hr.&nbsp; I'm not sure that logic works as well as the article suggests.&nbsp; It says, &quot;But maybe the biggest paradox of all is also the simplest one: If time travel were possible, wouldn’t we encounter these temporal tourists all the time?&quot;But, no!&nbsp; That's not a paradox!&nbsp; Paradoxes are things that are logically impossible, not just seemingly improbable or vexing.Remember the famous Grandfather Paradox - if you travel back in time, and kill your grandfather before your father is conceived, you aren't ever born, and so cannot travel in time to kill him.&nbsp; A time traveler eliminating time travel is logically the same!&nbsp; If time travel removes time travel, then the time travel doesn't exist to eliminate itself!If you are in a universe that does not allow paradoxes, then either time travel is just not possible, or it is otherwise impossible for you to enter the Grandfather Paradox.&nbsp; If you are in a universe that does allow paradoxes, then you travel in time, eliminate time travel... but you're still there, with your time machine, and haven't eliminated time travel!</blockquote>

[QUOTE="Umbran, post: 9751267, member: 177"] Hr. I'm not sure that logic works as well as the article suggests. It says, "But maybe the biggest paradox of all is also the simplest one: If time travel were possible, wouldn’t we encounter these temporal tourists all the time?" But, no! That's [I]not a paradox[/I]! Paradoxes are things that are [I][B]logically impossible[/B][/I], not just seemingly improbable or vexing. Remember the famous Grandfather Paradox - if you travel back in time, and kill your grandfather before your father is conceived, you aren't ever born, and so cannot travel in time to kill him. A time traveler eliminating time travel is logically the same! If time travel removes time travel, then the time travel doesn't exist to eliminate itself! If you are in a universe that does not allow paradoxes, then either time travel is just not possible, or it is otherwise impossible for you to enter the Grandfather Paradox. If you are in a universe that does allow paradoxes, then you travel in time, eliminate time travel... but you're still there, with your time machine, and haven't eliminated time travel! [/QUOTE]

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