Time-travel = end of the universe?
Posted 26 August 2010 - 12:31 AM
I will explain:
Freddy's grandfather met Freddy's grandmother during World War 2 on an army base, she was a nurse and he caught a bullet. Freddy is a scientist working on time-travel, he goes back in time and he takes out Hitler. Freddy's grandparents never met, and freddy doesn't exist anymore.
But now the other paradox comes into play: If Freddy never existed, he could never take out Hitler. Hitler still lives and starts World War two like it would've happened. Freddy's grandparents meet like they should've, and freddy invents time-travel again and goes back in time to kill hitler.
In other words, the entire universe is caught in a ~70 year loop!
So, what are your takes?
Posted 26 August 2010 - 12:40 AM
It's like when you play a game and travel back to a save point from earlier. Once you travel back, the timespace continuum you were previously in no longer matters (we will disregard that it being a game, you could have saved game in order to go back). What happens in the timeline you are currently in is independent of what happened in the 'future' timeline you were from. This is how most Commander Shepards romance more than one person.
The grandfather paradox depends on the assumption that it is impossible for parallel timelines to exist. If that were the case, then according to Stepehen Hawking, we'd already know time travel is impossible since nobody thus far has witnessed any time travellers from the future coming into our present day (or any time in the past). Unless you count stewox, who may be a time traveller from a dark and tumultuous future where everyone's retarded.
Edited by Valdez, 26 August 2010 - 12:48 AM.
Posted 26 August 2010 - 12:54 AM
And what if we have not seen time-travelers yet is because there has been only one, that caused a loop, when he tried to kill off hitler, and thusly not time exists after the point he jumped back in time, therefore we can not have new travelers since 'Freddy' caused this universe to loop on itself, which prevents anyone from using the same device as Freddy did.
And now I have to go to work.
Edited by Piglet, 26 August 2010 - 12:54 AM.
Posted 26 August 2010 - 02:38 AM
What Valdez said is the generally accepted theory: time travel creates an alternate universe.
How does the Grandfather Paradox fit in with the concept of saving a game, though? Hmm... I guess it doesn't. Saving/loading a game presupposes that you were there in the first place, so while you may be able to go back to a point in your own life (where you'd become your younger self), you can't load back to an event that happened before you started the game.
Edited by The Archon, 26 August 2010 - 02:41 AM.
Posted 26 August 2010 - 06:35 AM
Time travelling backwards is way too confusing anyway. How would the outside world perceive an entity that is moving back in time? Would it be like teleportation where it just vanishes?
Edited by Valdez, 26 August 2010 - 06:51 AM.
Posted 26 August 2010 - 08:42 AM
The Time Machine is different, and suggests continuous (though possibly invisible) presence, but I don't think that makes much sense, and it isn't handled very well in those movies. I haven't read the novel. Some time travel book I read a few years ago used x/t graphs, which also suggest continuous movement, but I'm very wary of pseudo-scientific books.
Maybe continuous presence is more likely, but sudden disappearance/appearance is easier to swallow, or just makes for more interesting movies.
Posted 26 August 2010 - 12:18 PM
For an example, all we know is that yesterday a nuke exploded in France(my favourite example evuuur), but due to the time traveler, we don't remember there being any threat at all or explosion because he went back to the early stage of 'whoopsiedaisy' and prevented it on a still harmless level.
Like killing Hitler when he was a baby, we wouldn't be all, 'OMG HITLER GOT KILLED WHILST HE WAS A BABY AND IN THE HOSPITAL THUS PREVENTING A WORLD WAR 2!' but never be aware that there was 'the' Hitler! (except for his parents..unless he went waaaay back)
Edited by Dei, 26 August 2010 - 12:18 PM.
Posted 26 August 2010 - 12:34 PM
You know this reminds me of all those silly time travel debates on the Red Alert series, which had dozens of blatant silly dumbness in the time travel mechanics...
Edited by Valdez, 26 August 2010 - 12:48 PM.
Posted 26 August 2010 - 01:57 PM
Posted 26 August 2010 - 06:49 PM
If we're making assumptions at that there are time travelers in the future, does that mean we're in the past? And if a time machine was invented, going back and eliminating Hitler before he becomes a threat would seem wise. But what are the consequences of that action? The whole "for every action, there is a equal and opposite reaction" has to happen, right?
Plus the complications and power needed for a time machine would be off the chart I imagine. Bending space and time to get in one place would probably be insane to calculate. The Earth spinning and moving through space at high rate of speed, the chance of actually appearing in another object, altitude, air pressure, gravity, weather, and who knows how many other factors. What about the off chance of the time traveler being pulled over? Or the time travel sneezing on someone and spreading a virus/bacteria for which no cure exists in the past?
So many things, so many possible consequences. Go back to remove Hitler and end up destroying the species with whatever flu will exist in a century.
Posted 27 August 2010 - 12:09 AM
Posted 27 August 2010 - 12:16 AM
Attack dogs. Also, dolphins.
Posted 27 August 2010 - 12:29 AM
Tanks with 4 seperate tracks?
Weather controling devices?
MIND CONTROLLING MADMEN!
Posted 04 September 2010 - 02:58 PM
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