context: A man drags a young boy in swim trunks into the surf at what appears to be a beach in a tropical location.
hypothesis: Chances are about even that a man and boy are in a body of water.
valid_hypothesis: It is certain that a man and boy are in a body of water.
invalid_hypothesis: Chances are about even that a man and boy are in a body of water.
hypothesis_assertion: A man and boy are in a body of water.