I agree; I'm not saying that a perfectly fair system would produce ratios identical to demographics. There's always going to be cultural aspects (though the deg

I agree; I'm not saying that a perfectly fair system would produce ratios identical to demographics. There's always going to be cultural aspects (though the degree to which black and white culture in America are separate is obviously a large part a consequence of racism and slavery). The point is only to use the outcome as a heuristic for what to look into.