context: Chances are about even that Greg is gray. It is almost certain that Lily is a swan. There is a very good chance that Brian is a lion.
hypothesis: We doubt that lily is a swan, and Brian is a lion.
valid_hypothesis: We believe that lily is a swan, and Brian is a lion.
invalid_hypothesis: We doubt that lily is a swan, and Brian is a lion.
hypothesis_assertion: Lily is a swan, and Brian is a lion.