Nightwing
Nightwing
luke-o said:Sarcasm. Nice.
Oh, come on. They never defined the rules to time travel other than "You can't come back to the future". You can't call them out on rules which were never explicitly defined in the first place.
But there are rules (and by rules, I mean within the world of film) to time travel.
It's the two theories approach. Time is either a flat line that we all go across and no matter what we do when we travel through time we were always going to do that and it won't change anything. Or you go back, alter something and it changes everything.
As a side note, I actually prefer the later. While the former makes for very clever story telling, the later makes it a bit more interesting. But you can't have both.
Oh, there are way more theories than that. You simply believe that there's only anti-paradox time travel (You can't change the past, since you'll create a paradox in the future) and high-mutability time (I step on a butterfly and everything changes, ala A Sound of Thunder).
I already described the concept of "High Inertia" time, where you can actively influence the past, but it's hard to completely change things: certain people will eventually come to power, certain events (like Judgment Day) will happen, even if the details and exact circumstances are different. To me, that seems the most logical: The timeline seems to continue to change with every movie (Judgment Day being pushed back, the involvement of Dyson and developments due to the wreckage of the T-800, etc etc...), but the changes aren't major enough to really push things into a distinctly different future.
Or maybe they went the "Marvel Comics" way: Every time you go into the past, you're creating a completely different universe. So each new terminator being sent back is being sent back by a completely new, different Skynet, and can in no way change the past for that timeline. But it still can drastically alter events in the present.