context: It is improbable that Julius is a swan. It is probably the case that Mary got the milk. It is highly unlikely that Greg is a lion. It is probably not the case that if either Julius is a swan, or Mary got the milk, then Brian is a lion. It is probable that if Greg is a lion, and Julius is a swan, then Bernhard is a rhino. It is probable that if Julius is a swan, or Mary got the milk, then Sandra left the apple.
hypothesis: It is probably not the case that either Julius is a swan, or Brian is a lion.
valid_hypothesis: It is probably not the case that either Julius is a swan, or Brian is a lion.
invalid_hypothesis: It is certain that either Julius is a swan, or Brian is a lion.
hypothesis_assertion: Either Julius is a swan, or Brian is a lion.