context: It is probably the case that Julius is yellow. It is impossible that John left the apple. We believe that Brian is a swan. There is almost no chance that if either Brian is a swan, or John left the apple, then Sandra grabbed the milk. It is improbable that if Brian is a swan, and Julius is yellow, then Yann is thirsty. It is probable that if either John left the apple, or Julius is yellow, then Greg is a rhino.
hypothesis: There is a better than even chance that sandra grabbed the milk, and John left the apple.
valid_hypothesis: It is impossible that sandra grabbed the milk, and John left the apple.
invalid_hypothesis: There is a better than even chance that sandra grabbed the milk, and John left the apple.
hypothesis_assertion: Sandra grabbed the milk, and John left the apple.