In the South it became known as the "one-drop rule,'' meaning that a single drop of "black blood" makes a person a black. It is also known as the "one black ancestor rule," some courts have called it the "traceable amount rule," and anthropologists call it the "hypo-descent rule," meaning that racially mixed persons are assigned the status of the subordinate group. This definition emerged from the American South to become the nation's definition, generally accepted by whites and blacks.(Έλα βρε δεν ήταν και τόσο δύσκολο να το βρεις :)