context: Chances are slight that Antoine is hungry. It is highly unlikely that Brian is white. It is probably the case that Greg is yellow. There is a better than even chance that if either Greg is yellow, or Brian is white, then Winona is a wolf. It is probably not the case that if Brian is white, or Antoine is hungry, then Julius is a swan. We doubt that if Antoine is hungry, or Greg is yellow, then John went to the hallway.
hypothesis: It is impossible that either Winona is a wolf, or John went to the hallway.
valid_hypothesis: Chances are about even that either Winona is a wolf, or John went to the hallway.
invalid_hypothesis: It is impossible that either Winona is a wolf, or John went to the hallway.
hypothesis_assertion: Either Winona is a wolf, or John went to the hallway.