Anchor: A surfer in a black wetsuit holding his balance on the crest of a wave as it begins to break around him.
Entailed: a guy on a surfboard steadies himself on breaking waves
Contradiction: A surfer is really drunk surfing.
Contradiction: A person is snowmobiling
Contradiction: The man is walking along the beach.
Contradiction: two men stand on the beach
Contradiction: A surfer is being eaten by a great white shark.