Would the Grandfather Paradox Actually Happen?

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The time traveller was adopted

same problem, who would have adopted the parent of the time traveler? If its possible to go back, even observing may have an influence on future events, but then that would be another paradox.

The physicist, like many others, believes in the idea of parallel universes, so that paradox would not arise.

That's blasphemy!

Would the Grandfather paradox actually happen? If we could accept or reject it, it wouldn't be a paradox, would it?

No.

http://en.wikipedia.org/wiki/Novikov_se ... _principle

If you go back in time to kill your own grandfather, you will obviously fail to do so because it did not happen (assuming the existence of time travel). That's my story and I'm sticking to it.

Me too. The past cannot be changed. Even if you did not fail, you would still fail because you did not exist to succeed.

parrallel universe

For which there exists no evidence.

that pretty much puts time travel into perspective then.. no evidence

Yes, but while CTCs may exist in relativity theory, a mechanism by which you can jump between universes or start new ones is bald-faced speculation.

what does CTC stand for?.. i don't have a degree. i apologise..

quantum physics has theories which correlate strongly with parrallel universes.. it's all about knowing your dimensions.. it goes all the way up to the 10th dimension i believe..

CTC = closed timelike curve. They are the scientific foundation of time travel.

If you're referring to the many worlds interpretation of quantum theory, it seems to me there are many better and more popular interpretations of QM. And for the ten dimensions, that is usually paired with string theory, which remains to actually make a prediction...

(Of course, this is not my field either)

either way.. it's all speculation.. but i think our perspective of time is the reason we dont see it for what it actually is.. if we go back in time, or attempt to, it won't be the 4th dimesion that you're travelling through, because that is not its natural function.. therefore the regular rules of time are irrelevant.. it would make sense to think of a parrallel universe.. in order to get to a place in the 'past' we have to go through the 5th dimension and in doing that you're linked by the 5th not the 4th dimension.. it might even be possible to be in two places at once and be projected into a new universe

of course, im no physicist.. but i recall some of the points ive read by relevant scientists..



<--- 777th post!.. in this glorious moment i hold the key of heaven.

Ahh, the granddaddy paradox...

Well, in theory there's three things that could happen in such a scenario.

1. You kill you grandfather and thus negate your existence, thus negating your killing your grandfather and so on... endless paradox loop. Who knows what the hell really happens then... The paradox answer.

2. You kill your grandfather and yet still exist. This would imply that you have now created an alternate timeline or dimension in which your grandfather is dead and you do not exist. The parallel universe answer.

3. You attempt to kill your grandfather but die in the process from an accident that was fated just for you, or just fail at the attempt in general. Thus the timeline proceeds just as it always was. The unchangeable destiny answer.

Although many people assume the past cannot be changed why do they assume the future is changeable? We live in illusion.