Anchor: A man is climbing a boulder over a body of water.
Entailed: Someone is climbing a boulder.
Contradiction: It is snowing.
Contradiction: All the tombs in the valley have the exact same carvings. 
Contradiction: The tennis champ is trying hard to win the game.
Contradiction: The Warren Court wasn't engaged in any social activism.
Contradiction: The company's web site has at least two specific restrictions.