context: It is probable that Lily is a swan. There is little chance that Greg is gray. It is improbable that Mary dropped the milk. It is likely that if Greg is gray, and Lily is a swan, then Winona is a wolf. It is highly likely that if either Lily is a swan, or Greg is gray, then Sandra grabbed the milk. There is almost no chance that if Greg is gray, or Mary dropped the milk, then John took the apple.
hypothesis: It is impossible that mary dropped the milk, or Sandra grabbed the milk.
valid_hypothesis: There is a better than even chance that mary dropped the milk, or Sandra grabbed the milk.
invalid_hypothesis: It is impossible that mary dropped the milk, or Sandra grabbed the milk.
hypothesis_assertion: Mary dropped the milk, or Sandra grabbed the milk.