context: Chances are about even that Brian is a rhino. Chances are slight that John dropped the milk. It is probable that Sumit is thirsty.
hypothesis: It is highly unlikely that john dropped the milk, and Sumit is thirsty.
valid_hypothesis: It is highly unlikely that john dropped the milk, and Sumit is thirsty.
invalid_hypothesis: There is a better than even chance that john dropped the milk, and Sumit is thirsty.
hypothesis_assertion: John dropped the milk, and Sumit is thirsty.