Anchor: Once, the huge man swung so hard he lost his balance and stumbled forward.
Entailed: The huge man lost his balance.
Contradiction: The huge man was so big that he couldn't lose his balance.
Contradiction: Don't dare turn it
Contradiction: A pup bites wood.
Contradiction: A bird's-eye-view of a deserted city.
Contradiction: That is something I must do.