context: There is a better than even chance that Greg is a swan. It is almost certain that Bill is in the cinema. There is a better than even chance that Sandra grabbed the milk.
hypothesis: Chances are about even that sandra grabbed the milk, or Bill is in the cinema.
valid_hypothesis: It is certain that sandra grabbed the milk, or Bill is in the cinema.
invalid_hypothesis: Chances are about even that sandra grabbed the milk, or Bill is in the cinema.
hypothesis_assertion: Sandra grabbed the milk, or Bill is in the cinema.