Anchor: They sat and stared at the black-eyed sharp-toothed monsters who littered the earth.
Entailed: They were looking at the monsters with black eyes. 
Contradiction: They stopped and stared at the purple eyed monsters roaming the earth. 
Contradiction: The man is wearing a coat.
Contradiction: Three girls are outside.
Contradiction: A dog is sitting on a rug.
Contradiction: If it is falling what's the difference?