Question is as the title.
I actually ask this because I am editing the subtitles for a Chinese documentary about prehistoric humans and the slightly dubious conclusion that many of the Chinese scientists are trying to support: That humans don't have a single point of origin.
This is some of their "evidence" but it still raises and interesting question that I can't quite answer.
Slightly related: what exactly are "microcores"?
I think that if the Chinese scientists are going for that conclusion then they are in serious trouble. Japanese archeology was headed in that direction once, and the result wasn't pretty
As to the main body of your question, I defer to the more archeo-paleo minded redditors for an answer.