context: It is probable that Mary moved to the office. It is almost certain that Brian is a lion. There is little chance that Jeff went to the kitchen. It is highly likely that if Mary moved to the office, and Brian is a lion, then Bernhard is yellow. It is certain that if Jeff went to the kitchen, or Brian is a lion, then John discarded the milk. Chances are about even that if Brian is a lion, or Mary moved to the office, then Lily is a frog.
hypothesis: It is impossible that brian is a lion, and Bernhard is yellow.
valid_hypothesis: There is a better than even chance that brian is a lion, and Bernhard is yellow.
invalid_hypothesis: It is impossible that brian is a lion, and Bernhard is yellow.
hypothesis_assertion: Brian is a lion, and Bernhard is yellow.