context: It is impossible that Julius is a lion. We doubt that Brian is a swan. It is probable that Bernhard is a rhino. It is certain that if either Brian is a swan, or Julius is a lion, then Bill went to the hallway. It is improbable that if Brian is a swan, and Julius is a lion, then Sandra got the milk. It is probably not the case that if Bernhard is a rhino, and Julius is a lion, then John put down the apple.
hypothesis: It is impossible that sandra got the milk, or Julius is a lion.
valid_hypothesis: It is impossible that sandra got the milk, or Julius is a lion.
invalid_hypothesis: It is certain that sandra got the milk, or Julius is a lion.
hypothesis_assertion: Sandra got the milk, or Julius is a lion.