context: There is a better than even chance that Fred went to the bedroom. There is a very good chance that Sandra grabbed the milk. It is improbable that Brian is white. It is highly likely that if Fred went to the bedroom, and Brian is white, then Julius is yellow. There is almost no chance that if Brian is white, and Sandra grabbed the milk, then Greg is a rhino. There is little chance that if Fred went to the bedroom, or Sandra grabbed the milk, then Mary dropped the milk.
hypothesis: Chances are slight that sandra grabbed the milk, and Mary dropped the milk.
valid_hypothesis: Chances are slight that sandra grabbed the milk, and Mary dropped the milk.
invalid_hypothesis: We believe that sandra grabbed the milk, and Mary dropped the milk.
hypothesis_assertion: Sandra grabbed the milk, and Mary dropped the milk.