Anchor: The man is scaling up a large boulder with people spotting underneath.
Entailed: A guy climbs up a rock.
Contradiction: Two women ride bikes down a steep slope in the city.
Contradiction: Two adults ride horses.
Contradiction: A skateboarder is sitting on his board.
Contradiction: It would be impossible to set up a system for negotiating contract prices with a government postal service.
Contradiction: For three billion years, the only life-forms on Earth were single-celled organisms.