context: There is almost no chance that Brian is a lion. There is little chance that Lily is gray. There is little chance that Antoine is thirsty. There is a very good chance that if Antoine is thirsty, or Brian is a lion, then John put down the apple. Chances are about even that if Lily is gray, or Antoine is thirsty, then Mary went to the garden. It is certain that if Brian is a lion, or Antoine is thirsty, then Bernhard is a lion.
hypothesis: It is certain that either Brian is a lion, or John put down the apple.
valid_hypothesis: There is little chance that either Brian is a lion, or John put down the apple.
invalid_hypothesis: It is certain that either Brian is a lion, or John put down the apple.
hypothesis_assertion: Either Brian is a lion, or John put down the apple.