Anchor: He'd been listening outside the door of the flat, but couldn't hear anything.
Entailed: He didn't hear anything outside the door of the apartment. 
Contradiction: He heard everything while standing outside the apartment door. 
Contradiction: The men are mopping the floor
Contradiction: You have to get permission to use project Gutenburg's trademark.
Contradiction: We decided to cancel Ask Bill Barnes, and not unveil it to the public.
Contradiction: A person doing down the mountain.