There’s more genetic variation within any so-called racial group than between groups, so race obviously has no genetic justification. That's not semantics. Yes it's real, but for social, not genetic reasons.
> If there's no genetic justification, how would it be possible to trivially determine someone's race just from their DNA ?
Genetic ancestry is determined by correlation with geographic origins and population. In other words, where a set of genetic markers are highly concentrated. It says nothing about race.
