Anchor: A blond saxophone player and a black-haired saxophone player are talking at a concert.
Entailed: Two saxophone players are talking.
Contradiction: The saxophone players are blonde and brunette.
Contradiction: The family sat on the beach.
Contradiction: The practice of examining the effects during one day may understate the risk of exposure. 
Contradiction: No way in hell.
Contradiction: The EPA supplied additional information in the preface to provide a rationale for the retention of a 5 percent flow loss performance standard.