Anchor: Two girls fighting during a karate tournament.
Entailed: Girls are fighting during a karate competition.
Contradiction: Two girls are doing each other's nails.
Contradiction: The academic pecking order, and all that it involves, is vital for a scientific attitude. 
Contradiction: The agents sent the man a prank.
Contradiction: Dowd does not agree with anything about him.
Contradiction: the man is at the beach