context: It is unlikely that Lily is a lion. We believe that Julius is white. It is improbable that Greg is gray. There is a better than even chance that if either Julius is white, or Greg is gray, then Bernhard is a rhino. It is unlikely that if Julius is white, or Greg is gray, then Mary went to the hallway. It is probably not the case that if Julius is white, and Lily is a lion, then Brian is a lion.
hypothesis: We doubt that either Mary went to the hallway, or Brian is a lion.
valid_hypothesis: We doubt that either Mary went to the hallway, or Brian is a lion.
invalid_hypothesis: It is likely that either Mary went to the hallway, or Brian is a lion.
hypothesis_assertion: Either Mary went to the hallway, or Brian is a lion.