Anchor: A boy is surfing.
Entailed: A human is using the tide to move on a board.
Contradiction: A boy is surfing on a meteor heading for New York.
Contradiction: According to all versions, the presence of St. Ursula and the 11,000 Virgins was coincidental and had no effect on it.
Contradiction: These people are backwards and I think it is pathetic.
Contradiction: I always wanted to try out their product, and I saved some money for it.
Contradiction: A man goes down a hill made of sand.