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There is more genetic diversity between African populations than between Africans and non-Africans, to the point where Eurasians could be considered to be an African tribe which might:
- have not received admixture from this archaic hominid (this is possible but far-fetched as the links you provided suggests).
- have received a similar admixture as everyone else but drifted further away because of isolation from other African tribes (by virtue of not being in Africa anymore).
It could be both but Occam's Razor suggests that the second option is a lot more likely.
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