There is no such thing as being half-white, for black, they explained, is less a biological category than a social one. It is a condition of the mind that is loosely linked to certain physical features, but more than anything it is a culture, a challenge, and a discipline. We were taught from the moment we could understand spoken words that we would be treated by whites as though we were black whether we liked it or not, and so we needed to know how to move in the world as black men. And that was that.