On the subject of race. Why is there a tacit assumption that all persons are

On the subject of race. Why is there a tacit assumption that all persons are

On the subject of race. Why is there a tacit assumption that all persons are white unless identified as some different race? Example: Maybe a guy is lost from his group at a big convention or something and he tells someone that he is looking for "these three guys... one of them is black, and one of them has a big nose ring?" Like black-ness is an unusual trait to be used to pick somebody out of a crowd or a police line up, like a scar or a tattoo. I hope this made at least some sense.

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