context: It is certain that Greg is white. It is certain that Mary moved to the garden. There is little chance that Fred went to the cinema. It is unlikely that if Fred went to the cinema, and Greg is white, then Bernhard is gray. There is little chance that if either Greg is white, or Fred went to the cinema, then Julius is a swan. It is almost certain that if Fred went to the cinema, and Greg is white, then Lily is a lion.
hypothesis: It is certain that either Lily is a lion, or Julius is a swan.
valid_hypothesis: We doubt that either Lily is a lion, or Julius is a swan.
invalid_hypothesis: It is certain that either Lily is a lion, or Julius is a swan.
hypothesis_assertion: Either Lily is a lion, or Julius is a swan.