context: It is probably the case that Brian is a lion. It is unlikely that Bill is in the school. It is probably not the case that Antoine is thirsty. Chances are about even that if Bill is in the school, or Brian is a lion, then Bernhard is yellow. There is little chance that if Antoine is thirsty, or Brian is a lion, then Lily is a swan. It is impossible that if either Antoine is thirsty, or Brian is a lion, then Jeff dropped the apple.
hypothesis: There is little chance that either Brian is a lion, or Antoine is thirsty.
valid_hypothesis: There is a better than even chance that either Brian is a lion, or Antoine is thirsty.
invalid_hypothesis: There is little chance that either Brian is a lion, or Antoine is thirsty.
hypothesis_assertion: Either Brian is a lion, or Antoine is thirsty.