context: It is almost certain that Fred went to the bedroom. It is almost certain that Brian is a lion. It is probable that Julius is gray. There is a better than even chance that if Julius is gray, or Fred went to the bedroom, then Mary left the apple. It is highly likely that if Fred went to the bedroom, or Julius is gray, then Bernhard is a swan. It is probable that if either Brian is a lion, or Fred went to the bedroom, then Lily is a rhino.
hypothesis: There is little chance that brian is a lion, and Bernhard is a swan.
valid_hypothesis: There is a very good chance that brian is a lion, and Bernhard is a swan.
invalid_hypothesis: There is little chance that brian is a lion, and Bernhard is a swan.
hypothesis_assertion: Brian is a lion, and Bernhard is a swan.