Anchor: A man is on a surfboard surfing the waves and catching good air.
Entailed: A man on a surfboard is surfing.
Contradiction: A man is swimming away from a shark.
Contradiction: Computers shrunk immensely, becoming smaller than people's fingernails.
Contradiction: The impact left him gasping for breath,
Contradiction: The university is the only college you will find there.
Contradiction: Using a combination from the flight data recorder and the cockpit voice recorder, the safety board lab was able to understand the sequence of events.