Question: Just wondering out loud. Since Marty showed Doc the drawing of a flux capacitor in 1955, I think this would have caused some infinite loop in the universe. I'll explain it better. Wouldn't Marty have destroyed the universe because he showed Doc the time machine in 1955, meaning Doc wouldn't have had the machine tested out in 1985 because the design was already "completed" in 1955? Meaning Marty never would have gone back in time in the first place to show Doc the time machine, meaning that Doc would test it out in 1985. Meaning that Marty would have gone back to 1955 and showed Doc the time machine, meaning Doc wouldn't have tested it out in 1985, meaning Marty wouldn't have gone back in time and showed Doc the time machine, etc.
Question: I'm really confused, and need help with this. I saw the second BTTF, so I saw the scene when Doc explains the two timelines and changing the future, but I'm still confused. If what Doc said was true, when Marty got hit by the car, he would have changed the future by preventing his parents from marrying. Therefore, there are now several timelines in the movie all going off at the same time. According to the movie, the first one is a timeline where Marty goes into the time machine back to 1955, and he has a loser for a father. There is also a timeline just like the first one, but George punched Biff, making him cool in the future. Another, alternate timeline is also present where Marty's parents haven't married, Marty doesn't exist, and none of the events from the first two timelines happen in this timeline. However, if this were true, all three timelines would have to be there, as Marty jumps from timeline to timeline in the movie and then in the end, watched himself do it again. First he would be in the regular timeline, then as he prevents his parents from meeting, he is in the other timeline. As he puts his parents back together and goes to 1985, he is now in the "cool father timeline". That is how I see the movie. Can somebody help shed some light on the subject for me?
Question: If Marty and his brother and sister are fading from the photograph because they are being erased from existence, wouldn't that mean that the moment when the photograph was taken would also be erased from existence? If so, why doesn't the photograph itself disappear instead of just the people in it?
Question: What is George's working status with Biff at the end of the film? George mentions in the beginning that Biff is his supervisor so I assume Biff is George's boss but at the end of the film it is implied that Biff seems to be working for George or is George still working for Biff, but Biff is no longer bullying George?
Question: If Marty goes back to the future and sees a duplicate of himself go back to the past, would the duplicate see the Marty that had just got back to the future watch him (the duplicate that goes to the past), thus 3 Deloreans and infinitely more Deloreans as it continues...and so on and so forth, or is that the the universe rewriting his timeline to prevent this time loop of paradoxical events?