context: a man in a red shirt looking at a woman with red-hair
hypothesis: It is certain that a person is staring at a girl he think he recognizes.
valid_hypothesis: Chances are about even that a person is staring at a girl he think he recognizes.
invalid_hypothesis: It is certain that a person is staring at a girl he think he recognizes.
hypothesis_assertion: A person is staring at a girl he think he recognizes.