Anchor: A boy in a black tank top is hammering a nail into a piece of wood.
Entailed: The boy is working with a hammer.
Contradiction: The boy is playing with a ball.
Contradiction: I think people don't use the word 'quality' in any sentence.
Contradiction: We should have lunch together.  
Contradiction: The man is robbing the bank.
Contradiction: He has a football in his hand.