Figure 1.

The logical relations of the various definitions of the multiple-race population in the United States according to various criteria. The population C identifying more than one race on surveys and the census will be only a subset of those with mixed racial ancestry, whether this is defined by genealogy A or by awareness B. Only the populations N and C will be enumerated in the 2000 census and other federal statistics. The population C marking more than one race differs from the population that would mark a separate “multiracial” category (the right-most dashed-line ellipse), the option rejected in the revised federal statistical standard. It also differs from the population made up of the children of interracial unions (the left-most dashed ellipse).