context: It is improbable that Brian is a lion. There is a very good chance that Lily is a rhino. We doubt that Mary went to the hallway.
hypothesis: There is a very good chance that lily is a rhino, or Brian is a lion.
valid_hypothesis: There is a very good chance that lily is a rhino, or Brian is a lion.
invalid_hypothesis: Chances are slight that lily is a rhino, or Brian is a lion.
hypothesis_assertion: Lily is a rhino, or Brian is a lion.