But how can it not matter? If it doesn't matter then why the time travel strategy in the first place, since its so easily reversable.
Okay, lets just stick with T1 for the sake of this argument.
When Skynet devised the time incursion plan, it did not anticipate failure. Like you, Skynet believed that sending the 800 back would alter events instantaneously, but the resistance smashed Skynet's defense grid and gained access to the time displacement equipment, and could counter-incure the timeline.
a-dev said:
If the T-800 goes through the time portal first, all its effects in the past should instantly become part of the new 2029 reality - including the death of Sarah Connor. With her dead, John is never born (and incidentally wouldn't have been born without Kyle anyway) and he never leads the resistance, the resistance that does appear never knows anything about him because he didn't exist so even if they do happen upon the time displacement equipment they won't know to send anyone back to the past to prevent the assassination....so JC remains as having never existed. No time loop.
As soon as the Resistance sends Kyle back to '84, anything the 800 could have done in Kyle's abscense is overwritten before it happens, just like John would have been if Kyle hadn't gone back. Also, if Kyle had not gone back, and Sarah had not defeated the endo in Cyberdyne's factory, Skynet would have been erased too, and there would be no Resistance. But Skynet has no way of knowing that.
a-dev said:
But then I find myself asking - if this all takes place as I've described would the Skynet that enacted this time incursion in the first place remain aware of 'resistance hero' John Connor after the success of the mission? Or would it experience a new reality where John Connor had never been born and thus never became significant..thus no time travelling need occur in this new reality.
A new reality without either John or Skynet, ie, our actual reality. Unless the endo remains are found in the Cyberdyne factory, there will be no Skynet.
That does raise the question though, what would the T-800 do after the success of the mission had it simply been able to shoot all three Sarahs and be done, especially if its nuclear power cells last for 150 years?
a=dev said:
...Surely, when it went the time travel route this, what I've described above, is what Skynet expected to happen - not the predestination paradoxes and continous time loops that actually seem to occur - because really, if it had known the resistance would have an infinity of chances to prevent it changing the past, I don't think it would have bothered trying in the first place.
And that's the missing piece Skynet cannot anticipate because it is caught in the time it is trying to change, and by trying to change it, it is making it happen. Nobody in the time paradox can see the time paradox like we can from outside their universe (we are like God watching it all play out). Let's say somebody had gone back in time in
our reality and changed something. We would have no way to know anything had once been different because from our POV it has always been that way.
Quantum Leap was all about this kind of situation. The premise of that show is that our real, existing, recent history (within his own lifespan) was made that way by Sam Beckett jumping all over the place changing things that had in some cases originally been much worse.
That's why T1 is so brilliant. Skynet created itself
and its enemy by trying to destroy its enemy. If Skynet had not developed the time displacement equipment by 2029, neither of them would even exist from 1984.
All that truelly matters is what is done in the earliest chronological point in any timeline.
In
Back to the Future, there were at least three different 1985s, but only Marty knew that because only he existed from a previous timeline. The only point in time that matter was Nov. 5th, 1955, when Marty's presence ends up altering the timeline.
Can you hear me now?