Anchor: A waterskiing man does a flip behind a speedboat.
Entailed: a man is on waterskiis
Contradiction: the man rollerskated to the park
Contradiction: Tuppence said that she walked into the wrong building by mistake, and left. 
Contradiction: That's something I didn't know
Contradiction: The blue race car crashed with the red car.
Contradiction: Daredevils come down the mountain