Anchor: And there's an interesting paradox here with Africana : Gates is probably the only black intellectual in America with the charisma and clout to get it published.
Entailed: The Africana paradox is Gates if the only black intellectual in America with enough clout to get it published. 
Contradiction: Gates is an unknown author whose work and ideas were never fully realized or noticed by anyone, least of all the media. 
Contradiction: a raft on the beach
Contradiction: The football player is running down the field.
Contradiction: There is one person
Contradiction: A group of people are yelling in joy.