context: It is probably the case that Brian is a lion. We believe that Julius is gray. We doubt that Lily is a swan.
hypothesis: There is almost no chance that either Julius is gray, or Brian is a lion.
valid_hypothesis: Chances are about even that either Julius is gray, or Brian is a lion.
invalid_hypothesis: There is almost no chance that either Julius is gray, or Brian is a lion.
hypothesis_assertion: Either Julius is gray, or Brian is a lion.