context: Chances are slight that Greg is a lion. There is a very good chance that Brian is gray. It is probably not the case that Lily is white.
hypothesis: It is highly unlikely that either Brian is gray, or Greg is a lion.
valid_hypothesis: We believe that either Brian is gray, or Greg is a lion.
invalid_hypothesis: It is highly unlikely that either Brian is gray, or Greg is a lion.
hypothesis_assertion: Either Brian is gray, or Greg is a lion.