context: It is likely that Brian is a swan. It is likely that Lily is a lion. There is a better than even chance that Mary dropped the apple. There is little chance that if Lily is a lion, or Brian is a swan, then Julius is gray. There is a better than even chance that if Mary dropped the apple, and Brian is a swan, then Sandra grabbed the milk. We believe that if Mary dropped the apple, or Brian is a swan, then Winona is a mouse.
hypothesis: It is probable that brian is a swan, or Sandra grabbed the milk.
valid_hypothesis: It is probable that brian is a swan, or Sandra grabbed the milk.
invalid_hypothesis: We doubt that brian is a swan, or Sandra grabbed the milk.
hypothesis_assertion: Brian is a swan, or Sandra grabbed the milk.