Anchor: Oklahoma University football players in front of a crowd of Sooners fans and next to three referees.
Entailed: There are at least five people.
Contradiction: The players are practicing alone in the stadium.
Contradiction: There is no cost difference between these flats and those that can be processed effectively. 
Contradiction: The road is wet and slippery.
Contradiction: I don't even want a maid of honor.
Contradiction: How long have you worked on the switchboard?