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shandrax,
you are stil making the mistake... race is not a scientific definable concept afaik. Correct me if I am wrong.
By the way gene pools doesn't do the trick as its boundaries are not aligned with anything like what people are trying to say when they use the word "race".
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I'm not a native english speaker, so I can't go into detail about the subleties of the true meaning of the word "race", but I assume you are recurring to something like this:
http://en.wikipedia.org/wiki/Human#Race_and_ethnicity
As mentioned in the article, it is a matter of perspective. Some scientists say A, others say B and I bet you can even find one for C.