I thought I heard the libs say he wasn't really black...I guess this picture disproves that.
Thomas Sowell is, in fact, a black man. What the libs you heard that from meant was that he "wasn't black" in the Condi sense of the term. He wasn't "keeping it real" by parroting the left-wing, identity-politics, whitey-done-me-wrong line. They meant that Dr. Sowell "isn't black" because he dares to do his own thinking.
Never mind the huge insult agaist black people implicit in this kind of thinking, though; the left cares about black people and the right doesn't.