Anchor: They had a fire going and were preparing to cook one of the mermaids.
Entailed: The mermaid was about to be eaten.
Contradiction: They had no way to make a fire.
Contradiction: A diver running in the race.
Contradiction: There were changes to the approved system requirements.
Contradiction: A woman is singing in church.
Contradiction: This bald man fell asleep at the library.