context: It is improbable that Greg is gray. There is a better than even chance that Julius is a lion. There is a very good chance that Brian is a swan.
hypothesis: Chances are about even that either Julius is a lion, or Brian is a swan.
valid_hypothesis: Chances are about even that either Julius is a lion, or Brian is a swan.
invalid_hypothesis: It is impossible that either Julius is a lion, or Brian is a swan.
hypothesis_assertion: Either Julius is a lion, or Brian is a swan.