Quote:
Originally Posted by Technomancer
OrangeAce and I share the same theory. I believe alternate timelines would branch out, new ones starting and going on their own tangent, but I don't believe going into the past will affect your timeline, like you can't erase yourself from existence IRL. Still, These were very enjoyable to read
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If you haven't noticed, the Flah-Scientist93 theory ties all three major time travel theories into one logical whole:
1) you can't change history, but
you don't see that (elementary in quantum physics!) before you travel through time the entire way; thus, it looks like
2) you can change history, but you're actually going through
3) alternate timelines (your and OA's theory inside of mine!

) which are tied circularly as you pass through them, forming a closed time loop where you make time travel cause itself. The trick is, you don't have to travel the full circle, and Marty didn't either throughout the film trilogy, since his parents are better at the point where he stopped in general (end of BTTF1 - present), than before his first time travel back in part 1. But if he can "undo" all of the changes he's originally made by his first time travel (making, in essence, what is (apparently (and NOT
just apparently!)!) an exact clone timeline of the one before his first time travel), and then make his journey cause itself by somehow unnoticedly traveling back to 1985 in a way that he
himself actually causes Libyans to go and "kill" Doc (we don't see in the first film if he survives or not, but Marty would've made sure that he does, since he can probably make everything
look the same regardless of whether he can sneak the letter in or not - making the truth that was always there!), then voila - he's actually back in his original timeline!!! If my and Flah's predictions are correct, the plot of our beloved episodic video game is going to be a closed time loop that touches the not fully traversed original one at the general point Marty has chosen to live at (what he thinks is the same history, but changed; as above, end of BTTF1 - present). Don't let the change in the newspapers content (Doc shot or not) fool you into thinking that wouldn't be a closed loop; it's all about probability, since Doc has done that part of time traveling independent of Marty, and it all ends the same anyway. At the closing of every such time loop, there is an apparent absence of free will, due to the necessary disinformation or lack of information! And note that the particular alternate-timeline structure of these loops also perfectly explains why Doc "Sagan" didn't disappear from the 1931 picture in the FCB timeline.
Savvy?

You can find more about the three main time travel rulesets here:
http://en.wikipedia.org/wiki/Time_travel
The free will issue is included and somewhat lampshaded in the first ruleset.