When Einstein was sent into the future, shouldn’t there have been another Einstein?

This is probably just a plot hole that many time travel movies fall victim too. But I'll try to use some movie logic to explain it.

Marty and Jennifer were able to see their future selves because they had full intention of going back to 1985. So they were seeing the future in which they had traveled to 30 years prior, then returned back to their time and lived the rest of their lives.

Einstein would not have been able to see himself in the future because he had no intention on going back to the time he left from. So for that amount of time (1 minute) there was no Einstein.

Of course that opens up the question of wouldn't future M & J remember the date that their past selves traveled too, and the reason that they traveled there (save their son)? But that's just another one of those things you need to not think to hard about with time travel movies.

No, when Marty and Jennifer went to 2015 there should not have been a Marty and Jennifer, in that timeline Marty and Jennifer would have just disappeared 30 years ago and were never seen or heard from ever again.

Also some people have speculated that the Marty and Jennifer in 2015 are the Marty and Jennifer who experienced all 3 films and lived their lives after the 3rd film from 1985 - 2015 however this isn't possible either because the Marty we see in 2015 didn't stand up to Needles and got into the car accident, the Marty who made it through all 3 movies didn't.

I always wondered if there were two Doc and Martys in 1985B.

Doc was committed and Marty had been sent to Switzerland in this reality, we're told. So, wouldn't that mean the versions of themselves that came back from 2015 were some kind of paradoxes that didn't exist?

I actually haven't seen the movie in a while but now I'm wondering, how did Einstein operate the time machine in order to get back to 1985? If it was just time catching up wouldn't he just have appeared like when you vanish when you are being erased from history?

This question proves you can't think fourth-dimensionally, so it's useless to read your threads.

Einstein SKIPPED over that minute. There wouldn't have BEEN an Einstein in the 'future', without DeLorean BRINGING one there. That was the only entry point into the future for Einstein. Where would there be another Einstein and why? Where would he come from? There was NO Einstein during one minute, so there wouldn't have been any 'other Einstein'.

Maybe better stop writing posts if you can't even understand the SIMPLEST time travel premise that was ALREADY EXPLAINED 36 years ago!