context: It is probably the case that Brian is a swan. It is almost certain that Julius is a lion. Chances are slight that John left the milk.
hypothesis: It is probably not the case that either Brian is a swan, or Julius is a lion.
valid_hypothesis: It is probably not the case that either Brian is a swan, or Julius is a lion.
invalid_hypothesis: It is probable that either Brian is a swan, or Julius is a lion.
hypothesis_assertion: Either Brian is a swan, or Julius is a lion.