I think we are getting caught in what it means to "exist". Perhaps my language was not precise enough. My meaning wasn't that the idea and abstraction of race does not exist in my earlier comments - my point was that the abstraction (social construct in this case) is very leaky, and doesn't match reality, hence the several examples I provide where the idea of race doesn't make sense at all. My argument is that the abstraction is so far removed from the reality that it's more harmful than helpful. In our computerized data driven modern reality, there's no reason we couldn't deeply assess every individual's full history and situation to determine how underprivileged they are, rather than using superficial and inaccurate measures such as skin color.