context: It is highly unlikely that Greg is a swan. It is likely that Mary moved to the office. We believe that John went to the hallway. It is highly likely that if Greg is a swan, and Mary moved to the office, then Daniel took the football. It is highly unlikely that if either John went to the hallway, or Greg is a swan, then Bernhard is white. There is a very good chance that if either John went to the hallway, or Greg is a swan, then Julius is gray.
hypothesis: There is little chance that either Bernhard is white, or Greg is a swan.
valid_hypothesis: There is little chance that either Bernhard is white, or Greg is a swan.
invalid_hypothesis: It is certain that either Bernhard is white, or Greg is a swan.
hypothesis_assertion: Either Bernhard is white, or Greg is a swan.