Anchor: Duck your head as the rowboat takes you through the one-m- (3-ft-) high cave entrance.
Entailed: The entrance to the cave is low.
Contradiction: The cave entrance is only reached by going under water.
Contradiction: The man is a bartender
Contradiction: There is a new telephone-related technology called asymmetric digital subscription line. 
Contradiction: The two men throw sawblades at each other.
Contradiction: American politics hates war when people are dying.