context: Chances are about even that Daniel left the football. There is almost no chance that Greg is a swan. It is probable that Fred went to the bedroom.
hypothesis: It is likely that either Fred went to the bedroom, or Greg is a swan.
valid_hypothesis: It is likely that either Fred went to the bedroom, or Greg is a swan.
invalid_hypothesis: We doubt that either Fred went to the bedroom, or Greg is a swan.
hypothesis_assertion: Either Fred went to the bedroom, or Greg is a swan.