Anchor: a person climbing up a vertical rock face stretching his leg out.
Entailed: Someone climbing up a vertical rock face stretching his leg out.
Contradiction: A dog climbing up a vertical rock face stretching his leg out.
Contradiction: Two people strolling side by side.
Contradiction: I thought that it was about time for one to arrive. 
Contradiction: A player has scored a touchdown.
Contradiction: A man is shirtless.