Time Travel Hypothesis : The Grandfather Paradox

[Chris Makise]

"The time traveller goes back in time and kills his grandfather before his grandfather meets his grandmother. As a result, the time traveller is never born. But, if he was never born, then he is unable to travel through time and kill his grandfather, which means the traveller would then be born after all, and so on."
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Grandfather paradox being a described and proposed paradox, which prevents your birth by the homicide of your grandfather. The paradox was described as early as 1931.

"Despite the name, the grandfather paradox does not exclusively regard the impossibility of one's own birth. Rather, it regards any action that eliminates the cause or means of traveling back in time".

Says Wikipedia.

The paradox poses kind of a threat to some laws of physics, so our old grandpa (not really grandpa xD) proposed some hypothesis denying the existence of such paradox. By the circumstance of the grandfather never being dead, even if was attempted to, the murder didn't occur at all. Or by joining the world with a parallel universe, going to the "Many world interpretation theory".

So we'll need some heavy dose of people here, to discuss, about time travelling, and the grandfather paradox.

 

[KetsuekiR]

Ah, the classic Grandfather Paradox.

I like the idea of multiple instances of time, considering time as a sort of plane similar to the three dimensions we know (and love?). For anyone who doesn't know, it's basically where if you go back in time and kill your grandfather, it creates a branch in the time-line just before your grandfather dies and in the new branch, you will never been born but in the original, first branch, nothing will have changed.

Then again, if you think about it, if you're going to return (when going back to the future) to your own branch, it's physically impossible to kill your grandfather. The only way to exist after successfully killing your grandfather would be to move from the original branch to the new one, without ever going back in time, in parallel.

Of course, as with most other paradoxes, all of this is hypothetical and theory and with our understanding of time as limited as it is, only time will tell.

 

[Pinkie-Dawn]

There are many interpretations of time travel that it's hard to determine which one is the correct one. There are three common types of time travel changes. The first one is similar to the Grandfather Paradox, in which any change done in the past was meant to happen in the present, as displayed in the first Terminator movie. The second one is used by Ocarina of Time and Dragonball Z, in which any change in the past will split the timeline in half. The third one is similar to the second one, expect the timeline doesn't split and remains in the current path, and it's been used in the Back to the Future trilogy. The butterfly effect makes an honorable mention, where any slight change from the past (Ex: killing one prehistoric animal) changes the present completely.

 

[Somewhere_]

How about we just dont kill our grandfather? :P

 

[Chris Makise]

That paradox would only ocurr if there was a unique time-line which i don't think it's the case. Assuming time travel is indeed possible, i believe the idea of having infinite time lines is more accurate than a simple time-line.

Not to mention the hypothesis, the most accurate and scientifically possible one, will always stand against our paradoxes, is the hypothesis, or rather put, the theory that time travel is impossible. Nature will prevent time travel to begin with. Still, we cannot say for sure.

There are many interpretations of time travel that it's hard to determine which one is the correct one. There are three common types of time travel changes. The first one is similar to the Grandfather Paradox, in which any change done in the past was meant to happen in the present, as displayed in the first Terminator movie. The second one is used by Ocarina of Time and Dragonball Z, in which any change in the past will split the timeline in half. The third one is similar to the second one, expect the timeline doesn't split and remains in the current path, and it's been used in the Back to the Future trilogy. The butterfly effect makes an honorable mention, where any slight change from the past (Ex: killing one prehistoric animal) changes the present completely.

Yes, the anime "Steins; Gate" gives such examples of time traveling.

Ah, the classic Grandfather Paradox.

I like the idea of multiple instances of time, considering time as a sort of plane similar to the three dimensions we know (and love?). For anyone who doesn't know, it's basically where if you go back in time and kill your grandfather, it creates a branch in the time-line just before your grandfather dies and in the new branch, you will never been born but in the original, first branch, nothing will have changed.

Then again, if you think about it, if you're going to return (when going back to the future) to your own branch, it's physically impossible to kill your grandfather. The only way to exist after successfully killing your grandfather would be to move from the original branch to the new one, without ever going back in time, in parallel.

Of course, as with most other paradoxes, all of this is hypothetical and theory and with our understanding of time as limited as it is, only time will tell.

Apologies, but declaring "For anyone who doesn't know" seems little head over heels, xD sorry, there is a reason why we use "Hypothesis" in this manner. We are not for sure, the mystery of time travel still is in the shadow's.

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John Titor was a self proclaimed time travel who appeared throughout the bulletin boards during the 2000 and 2001.

Titor, in his numerous posts, revealed many secrets and facts about the time travel hypothesis, even though we are not for certain whether, what he said, is genuinely true, nor not. He describe a drastically altered future which seemed very unfamiliar compared to us, He mentioned Unite States being divided in 5 regions, 2015 being the homecoming of World War 3, And the nuclear warfare.

His main purpose, as he said, was to revive the IBN-5100 computer for some reasons.

He also later mentioned that, our timelines being different from each another, there may be some slight or dramatic differences between our timelines.

At least, for humanity's sake, today we don't have U.S divided into 5 regions, but wait.. 2015 ain't in its end yet.. XD

 

[Chris Makise]

Can the Paris attack be the prologue of World War 3 ? Well, what he said might have been true, and there are some similarities with his time line and ours, But the thing is, Our time line is slightly more peace-loving than his. But, no one knows what time has upon its sleeves!

 

[Pinkie-Dawn]

Sounds more like this isn't time travel at all, as this Titor guy came from an alternate universe, which is entirely different from time travel. It's the go-to tool for reboots and alternate continuities to long-running franchises.

 

[Artemis112358]

The thing with multiple branches is either originally there is only one timeline and each action creates a split making more and more. or there is originally an infinite amount of timelines and by changing something in your own timeline you then create a timeline exactly the same as another of the infinite timelines. No-one knows what would happen if a timeline was forcibly changed to be the same as another but popular theories are the two worlds merge, both worlds are destroyed, rip in space time continuum.

 

[KetsuekiR]

Apologies, but declaring "For anyone who doesn't know" seems little head over heels, xD sorry, there is a reason why we use "Hypothesis" in this manner. We are not for sure, the mystery of time travel still is in the shadow's.

Beautiful irony, I like to call it.

John Titor was a self proclaimed time travel who appeared throughout the bulletin boards during the 2000 and 2001.

Well, a lot of John Titor's "predictions" have failed miserably so this was most likely a hoax. While he did claim there'll be slight differences, literally all of his world changing major predictions were wrong and his story had inconsistencies everywhere.

That said, I still think time travel is a possibility in the distant future. I hope it's not, but it just might be.. We've already got theories on how to go forward in time (reaching speeds close to that of light) but someday, we might figure out the exact details. The problem is that eventually, time travel, like practically everything else already, will most probably end up on the public (and probably black) market.

 

[Chris Makise]

Sounds more like this isn't time travel at all, as this Titor guy came from an alternate universe, which is entirely different from time travel. It's the go-to tool for reboots and alternate continuities to long-running franchises.

Actually, time travelling and the Multiverse theory (Many world interpretation theory) are in a way, enlisted in the same category. Both are linked, both contains the matter of travelling, either in the dimension of time, space or in spacetime.

The thing with multiple branches is either originally there is only one timeline and each action creates a split making more and more. or there is originally an infinite amount of timelines and by changing something in your own timeline you then create a timeline exactly the same as another of the infinite timelines. No-one knows what would happen if a timeline was forcibly changed to be the same as another but popular theories are the two worlds merge, both worlds are destroyed, rip in space time continuum.

No one can declare for sure my friend, we are not for accurate, so we humans, leave these matters with the word "Hypothesis" as i mentioned earlier.

Beautiful irony, I like to call it.


Well, a lot of John Titor's "predictions" have failed miserably so this was most likely a hoax. While he did claim there'll be slight differences, literally all of his world changing major predictions were wrong and his story had inconsistencies everywhere.

That said, I still think time travel is a possibility in the distant future. I hope it's not, but it just might be.. We've already got theories on how to go forward in time (reaching speeds close to that of light) but someday, we might figure out the exact details. The problem is that eventually, time travel, like practically everything else already, will most probably end up on the public (and probably black) market.

John Titor. Define him with a hoax, or a true time traveler, still won't alter the matter. He was looking for a special feature the IBN-5100 computer contains, which was, in some surprising way, unknown to most of the scientists till that date.

Time travelling might be the worse knowledge we humans may ever acquire. Every knowledge is dangerous. Stephen Hawking says that time travelling may be impossible deeming the absence of travelers from future. But giving it another thought, it seems really racist for someone to reveal their identity being time travelers considering them, only to face cameras winding up everywhere to the thousands of laboratory and law information agencies's inquiries.

Time travel will be possible as i believe. But, this may also bring demise upon humanity. Considering the situation where such a dangerous knowledge, befalls into the hands of evil, we may, or will face demolition. So, as long as this idea stays a "fiasco", we may consider ourselves to be "safe"

 

[Chris Makise]

The absence of time travelers from the future could be explained with the theory which says that every time you travel in time, you create a new time-line, if that is correct, no one could ever an existing time-line like ours.

Also, regarding the multi-verse matter, i like to assume that every universe would have it's own infinite amount of time-lines separated from all other universes.

Yes, that is one way to explain why, we haven't seen a guy in an unfamiliar trend saying hi to us.

Well, we can't say. There is a possibilities for us to exist in different universes. Yes, from the difference of an inch in height to the difference of our whole atomic structure, there may be infinite numbers of us in the infinite numbers of universe floating around in this shell of Multiverse.

Scientist says, that there is a possibility for another "You" to exist in another universe if we consider the multiverse theory legitmate. Because, if there are infinite numbers of a thing, it's very well possible for there to exist another copy of one thing.

 

[KetsuekiR]

Stephen Hawking says that time travelling may be impossible deeming the absence of travelers from future. But giving it another thought, it seems really racist for someone to reveal their identity being time travelers considering them, only to face cameras winding up everywhere to the thousands of laboratory and law information agencies's inquiries.

Well, time travel may have been achieved but it may be controlled by the government and limited to trained officials who won't reveal that they are time travellers. This would explain why there aren't any time travellers in our time, they simply won't tell us if they are.

Also, I don't see how it's racist. o: