defined at its origin. when we look at the history of race and i think about the ways whiteness, for example, was defined. whiteness was defined as pure. meaning that at the time when folks were defining race, they were trying to imbun blackness with a certain level of evil and bar barrism is all it would take was that one drop to automatically ruin the purity and the sanctity of whiteness. if we're looking back five generations to see who is in your family, so long as there is no one who is not white in those generations, then you can be identified or categorized as white. on the other hand, if we look back and see anyone five generations ago, your great great great great grandparent is black, then you, too, are black. that is the mark, right? >> yeah. >> that is the thing that makes that person black.