American racial taxonomy logically makes mixed race impossible

Evidence

This schema is asymmetrical as to black and white inheritance. It logically precludes the possibility of mixed race because cases of mixed race, in which individuals have both black and white forebears, are automatically designated as cases of black race. — David Theo Goldberg, John Solomos, A Companion to Racial and Ethnic Studies, 721 (#expands, via linked claim)

Mixed-race presence offered an obvious challenge to polygeni c presumption. If, as polygenesis presumed, races are species, and species are defined by capacity to reproduce only among species members, the existence of mixed-race (or cross-species) offspring suggests failure to meet a crucial condition of the theory. — David Theo Goldberg, The Racial State, 17 (#complicates, via linked claim)

Categorization

• XREF: connects to: Official Colored category absorbed anyone failing crisp racial classification — Charles Tilly, Regimes and Repertoires, 563; Racial categories are defined purely by ancestor counting, not physical features — David Theo Goldberg, John Solomos, A Companion to Racial and Ethnic Studies, 718; Hypodescent rules make mixed-race people statistically impossible to classify as anything but black — David Theo Goldberg, John Solomos, A Companion to Racial and Ethnic Studies, 721 (+2 more)

Broader Connections

• Hypodescent rules make mixed-race people statistically impossible to classify as anything but black #expands (0.92) — David Theo Goldberg, John Solomos, A Companion to Racial and Ethnic Studies, 721
• Mixed-race offspring directly contradicted the polygenist claim that races are separate species #complicates (0.82) — David Theo Goldberg, The Racial State, 17