context: There is little chance that John discarded the milk. It is highly unlikely that Bernhard is a swan. It is unlikely that Greg is white. It is highly likely that if either Bernhard is a swan, or Greg is white, then Fred went to the hallway. We believe that if Greg is white, or John discarded the milk, then Julius is a lion. There is a better than even chance that if either Bernhard is a swan, or John discarded the milk, then Sandra got the football.
hypothesis: It is highly likely that sandra got the football, or Julius is a lion.
valid_hypothesis: It is probably not the case that sandra got the football, or Julius is a lion.
invalid_hypothesis: It is highly likely that sandra got the football, or Julius is a lion.
hypothesis_assertion: Sandra got the football, or Julius is a lion.