context: There is a better than even chance that John grabbed the milk. It is impossible that Brian is a swan. It is improbable that Julius is green. There is little chance that if John grabbed the milk, and Julius is green, then Fred went to the hallway. Chances are about even that if John grabbed the milk, and Brian is a swan, then Mary moved to the garden. It is likely that if John grabbed the milk, or Brian is a swan, then Bernhard is white.
hypothesis: It is impossible that mary moved to the garden, and John grabbed the milk.
valid_hypothesis: It is impossible that mary moved to the garden, and John grabbed the milk.
invalid_hypothesis: It is probable that mary moved to the garden, and John grabbed the milk.
hypothesis_assertion: Mary moved to the garden, and John grabbed the milk.