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Time Travel is impossible
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<blockquote data-quote="Harte" data-source="post: 28906" data-attributes="member: 443"><p><strong>Re: Time Travel is impossible</strong></p><p></p><p>Fanavan,</p><p>I have a few comments on this.</p><p> </p><p><div class='quotetop'>QUOTE(\"fanavans\")</div></p><p> </p><p>Here you specify a point in time {T(0)} but leave unspecified the spatial coordinates. This mathematically implies that W occupies all the 3 dimensional universe at T(0). Therefore your analysis would only be correct in that the entire universe cannot be somehow brought backwards in time. I submit you should say here that W exists at T(0),X<span style="font-size: 10px">at T(0), hence he need not occupy the same space.</span></p><p>Your argument could be used to "prove" the impossibility of your own existence. After all, by your statements, it's fair to say that at T(0), you also occupied T(-1),x,y,z, if you haven't moved.</p><p> </p><p><div class='quotetop'>QUOTE(\"fanavans\")</div></p><p> </p><p>You have defined repeatedly the space W occupies at T(0), why do you continue to insist that W also occupy the same space for all T<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite60" alt="(n)" title="Thumbs down (n)" loading="lazy" data-shortname="(n)" />?</p><p> </p><p><div class='quotetop'>QUOTE(\"fanavans\")</div></p><p> </p><p>This conclusion is not supported by your statements. The only conclusion you can arrive at through these arguments is similar to the grandfather paradox. It is impossible for one to travel back in time and enter a universe where his existence was already established. Considering that a first-time time traveller must by definition never have travelled into the past, how can we explain his existence there in the past prior to his use of the time machine? This is arguing in circles, a phenomenon that time travel is replete with.</p><p> </p><p><div class='quotetop'>QUOTE(\"fanavans\")</div></p><p> </p><p>This illustrates what I was saying above. The presence of the girl 100 years in her past cannot be explained using standard models of logic and analysis. This does not invalidate the idea of time travel into the past, however. The problem here stems from a logical progression of events in the spacetime continuum. That is, it appears that, since the time "loop" was made, the girl is fated to continue travelling into the past over and over. The way out of this process is to realize that the universe is not being made over here. The girl goes into the past, lives and then dies. The ultimate cause for what happens during her life in the past lies in the future. This is a juxtaposition of cause and effect that we are unused to. It doesn't mean that it can't happen though.</p><p> </p><p>Not trying to be critical here, it's just that there is no scientific basis for the idea that time travel is impossible. At least not yet. I trust those brainiacs that sit around figuring these things out enough to take their word on this, that physics does not (currently) rule out the possibility of travelling into the past.</p><p> </p><p>Harte</p></blockquote><p></p>
[QUOTE="Harte, post: 28906, member: 443"] [b]Re: Time Travel is impossible[/b] Fanavan, I have a few comments on this. <div class='quotetop'>QUOTE(\"fanavans\")</div> Here you specify a point in time {T(0)} but leave unspecified the spatial coordinates. This mathematically implies that W occupies all the 3 dimensional universe at T(0). Therefore your analysis would only be correct in that the entire universe cannot be somehow brought backwards in time. I submit you should say here that W exists at T(0),X[SIZE=2]at T(0), hence he need not occupy the same space.[/SIZE] Your argument could be used to "prove" the impossibility of your own existence. After all, by your statements, it's fair to say that at T(0), you also occupied T(-1),x,y,z, if you haven't moved. <div class='quotetop'>QUOTE(\"fanavans\")</div> You have defined repeatedly the space W occupies at T(0), why do you continue to insist that W also occupy the same space for all T(n)? <div class='quotetop'>QUOTE(\"fanavans\")</div> This conclusion is not supported by your statements. The only conclusion you can arrive at through these arguments is similar to the grandfather paradox. It is impossible for one to travel back in time and enter a universe where his existence was already established. Considering that a first-time time traveller must by definition never have travelled into the past, how can we explain his existence there in the past prior to his use of the time machine? This is arguing in circles, a phenomenon that time travel is replete with. <div class='quotetop'>QUOTE(\"fanavans\")</div> This illustrates what I was saying above. The presence of the girl 100 years in her past cannot be explained using standard models of logic and analysis. This does not invalidate the idea of time travel into the past, however. The problem here stems from a logical progression of events in the spacetime continuum. That is, it appears that, since the time "loop" was made, the girl is fated to continue travelling into the past over and over. The way out of this process is to realize that the universe is not being made over here. The girl goes into the past, lives and then dies. The ultimate cause for what happens during her life in the past lies in the future. This is a juxtaposition of cause and effect that we are unused to. It doesn't mean that it can't happen though. Not trying to be critical here, it's just that there is no scientific basis for the idea that time travel is impossible. At least not yet. I trust those brainiacs that sit around figuring these things out enough to take their word on this, that physics does not (currently) rule out the possibility of travelling into the past. Harte [/QUOTE]
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