context: It is probable that Mary went to the bedroom. It is highly unlikely that Lily is a swan. Chances are about even that Julius is white. There is a better than even chance that if Mary went to the bedroom, and Julius is white, then Daniel dropped the apple. There is almost no chance that if either Mary went to the bedroom, or Julius is white, then Brian is yellow. It is highly likely that if Julius is white, and Mary went to the bedroom, then Greg is a lion.
hypothesis: There is almost no chance that lily is a swan, and Daniel dropped the apple.
valid_hypothesis: There is almost no chance that lily is a swan, and Daniel dropped the apple.
invalid_hypothesis: There is a very good chance that lily is a swan, and Daniel dropped the apple.
hypothesis_assertion: Lily is a swan, and Daniel dropped the apple.