context: Someone in a red and white uniform is driving a red and white motorcycle down a track with the front wheel in the air.
hypothesis: There is a very good chance that a man does stunts on a motorcycle.
valid_hypothesis: There is a very good chance that a man does stunts on a motorcycle.
invalid_hypothesis: It is unlikely that a man does stunts on a motorcycle.
hypothesis_assertion: A man does stunts on a motorcycle.