context: It is almost certain that Winona is a cat. It is probable that Mary left the football. It is likely that Sandra grabbed the milk.
hypothesis: It is certain that sandra grabbed the milk, and Mary left the football.
valid_hypothesis: Chances are about even that sandra grabbed the milk, and Mary left the football.
invalid_hypothesis: It is certain that sandra grabbed the milk, and Mary left the football.
hypothesis_assertion: Sandra grabbed the milk, and Mary left the football.