Anchor: A yawning man and a smiling boy are sitting on the pavement.
Entailed: Two people are sitting on the ground.
Contradiction: The boy is frowning.
Contradiction: Internal controls can guarantee that an agency will meet all their objectives.
Contradiction: A man is happy.
Contradiction: David Foster Wallace has never had anything even remotely negative to say about Updike or any of his work. 
Contradiction: A man walks on a tight rope.