context: There is little chance that Julius is yellow. It is unlikely that Mary went to the hallway. It is probable that Bernhard is a swan. It is improbable that if either Julius is yellow, or Mary went to the hallway, then Lily is gray. It is likely that if Bernhard is a swan, or Julius is yellow, then Sandra left the football. There is little chance that if Julius is yellow, and Bernhard is a swan, then Greg is white.
hypothesis: We believe that either Bernhard is a swan, or Sandra left the football.
valid_hypothesis: It is probably not the case that either Bernhard is a swan, or Sandra left the football.
invalid_hypothesis: We believe that either Bernhard is a swan, or Sandra left the football.
hypothesis_assertion: Either Bernhard is a swan, or Sandra left the football.