context: It is unlikely that Brian is green. We doubt that John went to the garden. It is likely that Bernhard is a swan. It is highly likely that if either Brian is green, or John went to the garden, then Julius is white. We believe that if either Bernhard is a swan, or John went to the garden, then Fred is in the bedroom. It is likely that if John went to the garden, and Bernhard is a swan, then Greg is a frog.
hypothesis: It is almost certain that either Fred is in the bedroom, or Brian is green.
valid_hypothesis: Chances are about even that either Fred is in the bedroom, or Brian is green.
invalid_hypothesis: It is almost certain that either Fred is in the bedroom, or Brian is green.
hypothesis_assertion: Either Fred is in the bedroom, or Brian is green.