context: It is almost certain that Lily is a lion. It is probable that Brian is gray. It is unlikely that Greg is yellow.
hypothesis: It is impossible that either Brian is gray, or Greg is yellow.
valid_hypothesis: There is a better than even chance that either Brian is gray, or Greg is yellow.
invalid_hypothesis: It is impossible that either Brian is gray, or Greg is yellow.
hypothesis_assertion: Either Brian is gray, or Greg is yellow.