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To me this seems idiotic to be harping about it since I managed to figure out something similiar a few years ago.
Its not possible to go back and kill your father before you were born because if that were the case, you wouldnt be able to go back and do it. Its simple as. That chain of events basically becomes redundant, and hence doesnt happen.
Why do people think this is a new concept?
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Pretty obvious isn't it?Maybe they just ran out of stuff to report. XD. The article words it kinda of wierd though. It makes it sound like if you go back in time to try and do something contradictory to present events the universe will somehow make a concious effort to foil your plans. It's like the universe sees you comming and says "No you don't you little @#$%!" [off topic moment] Still it upsets me a little that the news back in Europe is discussing Quantom Physics and the front pages here in the US are filled with news of Tom Cruise proposing to some little girl. I hate the American Media.[back on topic again]
Hm. I donâ€™t know too much about quantum mechanics myself, but I actually found the article to be quite interesting. Iâ€™ve spent many an hour pondering the paradox of time travel myself (it was one of the preferred pastimes in my former high school class â€“ that, and trying to figure out if jumping in an elevator travelling at the speed of light means you would land right before you jumped. Yes, I had some very odd class mates. :p) So hearing that a solution to the paradox has been found definitely has me interested.
One thing in the article did bug me, though. The following line, to be specific:
Clearly, the present never is changed by mischievous time-travellers: people don't suddenly fade into the ether because a rerun of events has prevented their births - that much is obvious.
I donâ€™t see why this should be so obvious. If someone went back in time and changed the past so that I would never be born, I wouldnâ€™t just disappear right in front of everyoneâ€™s eyes. I would just never have been born, meaning that they wouldnâ€™t have any memories of my existence, and so no one would know that the past had been changed, except perhaps the people doing it. The past could be changing this very moment and we wouldnâ€™t know it, for as soon as it has been changed, it has always been like that. So how can we know that changing the past is impossible if we can never prove that it hasnâ€™t already happened?
Another thing bugging me is the fact that the article claims it would be possible to go back and kill your own father, provided that you donâ€™t know with absolute certainty that he is still alive. Does this mean that it is possible to do this regardless of whether he is actually alive, if only you havenâ€™t seen him in a long time and have no knowledge of his whereabouts? Is it really the time-traveller who determines what past events can be changed, and not the universe itself? That seems strange to me. If this is the case, one could take a child, lock it inside a room until it reached maturity, and send it back in time to wreck absolute havoc, since the person wouldnâ€™t know the whereabouts of anyone. Events of huge importance for the future, such as World War II and 9/11, could be changed by such a person, and this goes against the articleâ€™s other claim: that it is impossible to change the future.
As I said, though, I am no expert in quantum mechanics, so likely Iâ€™ve just misunderstood something. I still found the article to be interesting, though, if only because it confirmed one of the theories developed by myself and my class mates. We just didnâ€™t have the knowledge of physics to prove it, so alas, there will be no Nobel Prize coming our way anytime soon.
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Yeah I was wondering about that part too. It sounded like the universe is acting based on what that individual knows and remembers. So if the only thing that prevents you from killing your father in the past is the fact that you know he's alive in the present, what happens if you bring somebody with you that was sure that your father was dead in the present and kills him? Wouldn't that create some kind of wierd conflict that the universe would have to deal with? Would the other person who beleives your father to be dead in the present be able to kill him and therefore canel your existence out or would your knowlege of your fathers existence in the present be what the universe gos of off and conspire against the other guy? I'm sure I'm probably just reading the article wrong though. It really sounds like they're just pulling stuff out thier arse to come up with something that discounts the whole "erasing yourself from history" paradox.We used to wonder about time travel and stuff, then we kept running around in circles and tossed the whole idea into the "stuff we'll never figure out" bin along with religion and why girls find Tobey Maguire attractive.
Thats great Edi xDOriginally Posted by Edicius
I have to agree with you guys. It does not make sense that just because you know your father is alive in the present that you would not be able to kill him in the past. Thats is like saying that because there is a large possibility that he will be alive tomorrow that I wouldn't be able to kill him today.
If someone manages to go back in time they should be able to change things as they please and we would be none the wiser as things would not just start to disappear they would never have existed in the first place. We are not talking Back to the Future here.
Fry is his own grandfather though, now that is disturbing...........
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You see I'm not so sure that is obvious, as ahs been said, who says that the past isn't changing all the time, or alternatively that the multiverse theory is not true and that every choice that can be made IS made and that there alternative universes for each one, thus time travel would involve going back in time and making a differnt choice in effect entering a parralel branch of a universe therefore not effecting your orgiinal, allowing you to exist where perhaps your father or mother did not as they do exist, just in a different reality, the one from which your has branched due to your tampering.