Anchor: A surfer rides out a wave.
Entailed: A surfer is swimming.
Contradiction: A surfer is fishing for sharks off his surfboard.
Contradiction: It's too hot for winter sports.
Contradiction: Using a system of ropes and pulleys, some people move furniture through the second story window of a building.
Contradiction: The law prohibits the Postal Service from making requests.
Contradiction: It was the screenwriter-architects first ever novel.