context: A person with dark hair in a white shirt is sitting in a chair in water with a "swim at your own risk" sign on the wall.
hypothesis: Chances are about even that a person is relaxing on his day off
valid_hypothesis: Chances are about even that a person is relaxing on his day off
invalid_hypothesis: It is certain that a person is relaxing on his day off
hypothesis_assertion: a person is relaxing on his day off