context: It is highly unlikely that Lily is yellow. There is little chance that Bernhard is a rhino. It is highly unlikely that Brian is a lion. It is probably not the case that if Brian is a lion, and Bernhard is a rhino, then Fred is in the park. It is almost certain that if either Lily is yellow, or Brian is a lion, then John went to the garden. It is highly likely that if Brian is a lion, or Lily is yellow, then Gertrude is a mouse.
hypothesis: It is highly unlikely that fred is in the park, or Brian is a lion.
valid_hypothesis: It is highly unlikely that fred is in the park, or Brian is a lion.
invalid_hypothesis: Chances are about even that fred is in the park, or Brian is a lion.
hypothesis_assertion: Fred is in the park, or Brian is a lion.