premise1: A man rides a surfboard through rough white and blue water.
premise2: A man dressed in black is surfing on a large blue wave.
premise3: A surfer is riding a wave.
premise4: A surfer rides the waves.
premise: A man rides a surfboard through rough white and blue water. A man dressed in black is surfing on a large blue wave. A surfer is riding a wave. A surfer rides the waves.
hypothesis: A surfer falls.