(CNN) -- Last week, the Internet was buzzing with the news that a DNA test of white supremacist Craig Cobb revealed that 14% of his genes originated in sub-Saharan Africa. The look on Cobb's face as he received the news? Priceless. Cobb appeared on "The Trisha Show" and discussed his plans to create an all-white town for white supremacists in Leith, North Dakota. "Whites are the highest expression of DNA on the planet," he said on the show. When Cobb received the DNA results, he wrote it off. "This is called statistical noise," Cobb responded. "Oil and water don't mix."
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White supremacist Craig Cobb learned that 14% of his genes originated in sub-Saharan Africa
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That would make him legally "black" under America's one-drop rule, Yaba Blay says
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The "one-drop rule" provided the legal and quantitative definition of blackness, and whiteness
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Blay: Irony of Cobb's heritage shows how nuanced racial identity is beyond skin color
During the period of @placeholder slavery, 1619 to 1865, freedom was predicated on skin color.