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I need to finish this by saying that none of this means that the "prejudice plus power" formulation isn't useful. It is useful. The loathing of a black slave for white people isn't the same thing as white people's loathing of black slaves, for example.
It's just you don't get to tell the sociologist or social psychologist who is using the term "racism" in its normal sense to mean racially motivated bigotry that they are somehow using language wrong. They're not.
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