context: It is probably not the case that Fred went to the hallway. It is highly unlikely that Lily is white. There is little chance that Brian is yellow. There is little chance that if Brian is yellow, and Lily is white, then Bernhard is a frog. It is almost certain that if either Lily is white, or Brian is yellow, then Greg is a swan. We believe that if Lily is white, and Fred went to the hallway, then Mary moved to the garden.
hypothesis: It is impossible that bernhard is a frog, and Lily is white.
valid_hypothesis: It is impossible that bernhard is a frog, and Lily is white.
invalid_hypothesis: It is almost certain that bernhard is a frog, and Lily is white.
hypothesis_assertion: Bernhard is a frog, and Lily is white.