context: It is certain that Bernhard is a lion. It is impossible that Julius is a swan. There is little chance that Bill went to the cinema. We doubt that if Bill went to the cinema, and Bernhard is a lion, then Lily is white. There is little chance that if Bill went to the cinema, and Julius is a swan, then Brian is yellow. It is highly likely that if Bernhard is a lion, and Julius is a swan, then Greg is yellow.
hypothesis: It is highly likely that brian is yellow, or Julius is a swan.
valid_hypothesis: It is impossible that brian is yellow, or Julius is a swan.
invalid_hypothesis: It is highly likely that brian is yellow, or Julius is a swan.
hypothesis_assertion: Brian is yellow, or Julius is a swan.