i highly doubt this is a new thought (especially given how sharp the people here are), but its been bugging me for some time.
so at the beginning, doc comes to marty and jennifer and tells them they have to do something about their kids in the future. no problem there. so they hop in the delorean and set course for 2015. THIS is where it starts bugging me. how can marty and jennifer help their kids if they (marty and jen) have essentially been removed from the timeline?
im hardly a genius when it comes to this stuff, but seems to me that when they leave in the delorean, they no longer exist in the timeline. since theyre moving through the two years, they dont exist between 1985 and 2015. how can they still have kids if they werent around in the preceeding 30 years? is the 2015 they go to an parallel universe?
i hope i did a good enough job of explaining what im getting at, cause im not always very good at getting out whats in my head
thoughts on this?