Anchor: By the way, your mistress didn't ask you to sign any paper yesterday?"
Entailed: Did your mistress ask you to sign any paper, yesterday?
Contradiction: Your mistress does not want any paper trail with you. 
Contradiction: A Black man eats a hamburger.
Contradiction: It's a good deal.
Contradiction: A family eating dinner together at the dinner table.
Contradiction: A swimmer prepares her equipment for a swim.