context: It is probably not the case that Bernhard is a swan. We believe that John discarded the apple. It is highly likely that Fred is in the bedroom. There is a better than even chance that if either Fred is in the bedroom, or Bernhard is a swan, then Julius is a rhino. It is probable that if John discarded the apple, or Fred is in the bedroom, then Lily is white. Chances are slight that if Fred is in the bedroom, or John discarded the apple, then Mary went to the office.
hypothesis: It is unlikely that either Bernhard is a swan, or Fred is in the bedroom.
valid_hypothesis: It is probable that either Bernhard is a swan, or Fred is in the bedroom.
invalid_hypothesis: It is unlikely that either Bernhard is a swan, or Fred is in the bedroom.
hypothesis_assertion: Either Bernhard is a swan, or Fred is in the bedroom.