Delaware students can now choose their own race (Yes, RACE!) under new regulations.

[MDMAlliance]

fatslob-:O said:

MDMAlliance said:

Actually, it's not that it CAN'T exist for humans.  It's simply that it doesn't.  

Assuming you've actually read the paper, you'd know that it actually argues against your point.

Right here at the end:

A final complication arises when racial classifications are used as proxies for geographic ancestry. Although many concepts of race are correlated with geographic ancestry, the two are not interchangeable, and relying on racial classifications will reduce predictive power still further.

The fact that, given enough genetic data, individuals can be correctly assigned to their populations of origin is compatible with the observation that most human genetic variation is found within populations, not between them. It is also compatible with our finding that, even when the most distinct populations are considered and hundreds of loci are used, individuals are frequently more similar to members of other populations than to members of their own population. Thus, caution should be used when using geographic or genetic ancestry to make inferences about individual phenotypes.

@Bold This line is all needed to support my assertion that certain "populations" can be defined ...

Are you reading that line wrong?  "Most human genetic VARIATION is found within populations" meaning that there's more variation within the populations.  The point of that line is to state that despite the fact of those variations, it's possible to trace ancestry to locations with enough data.  That's not really all that surprising.