context: It is likely that Lily is a rhino. There is a very good chance that Brian is gray. It is certain that Greg is a lion.
hypothesis: We doubt that either Brian is gray, or Greg is a lion.
valid_hypothesis: We doubt that either Brian is gray, or Greg is a lion.
invalid_hypothesis: It is likely that either Brian is gray, or Greg is a lion.
hypothesis_assertion: Either Brian is gray, or Greg is a lion.