Originally Posted by sn939
Okay, look at it this way. If Marty starts to fade because he's past the 'junction point', then that means that his fading is because of the fact that he is existing at a certain point of time. Ergo, if he chooses to travel to another earlier point in time, he should stop fading.
To my mind, it makes FAR more sense for the ripple effect to be probability based. I mean, there has to be a reason why Marty was starting to fade at PRECISELY the moment of George and Lorraine's kiss (which almost didn't happen)...and that he stopped fading and the McFly kids were 'restored' the moment they DID kiss. Or why the newspapers changed the moment the Almanac was burnt. Objects (and people!) from the future, reflect the most probable future based on how events are developing in the past. The ripple effect alters or erases them based on changing probabilities.
Keep in mind Marty only went back in time a few hours. you could also argue the process of him fading has already started.
Originally Posted by Tornreaper
I know what you're saying but you're also repeating your self. By your logic the newspaper should have changed exactly when they went to back to 1955 because that was before the junction point where Biff gave himself the Almanac (although we don't see the newspapers at that point).
Or the picture of the tombstone. It stayed the same when he arrived in 1885 even though it happened before he got shot. Why did it stay the same? Because that picture had already passed the junction point.
Whether traveling to the future or the past, pictures/newspapers don't change until they are actually changed. Doc dying and the biffhoric timeline are still reflected until they are actually changed. Or the october 22nd 2015 newspaper; it stays the same until the picture captioning it is taken differently (griff instead of marty jr). So for instance the act of traveling back to 1955 did not change the timeline for doc and marty. The newspapers did not change until the timeline was changed.