>>509409666>>50940966696-97% of Whites have no African ancestry.
http://www.theroot.com/articles/history/2013/02/how_mixed_are_african_americans.3.html
97% of Whites have no Black ancestry whatsoever.
https://www.researchgate.net/publication/269934680_The_Genetic_Ancestry_of_African_Americans_Latinos_and_European_Americans_Across_the_United_States
Common-sense racial categories have biological meaning.