context: There is a very good chance that Brian is a rhino. It is impossible that Fred dropped the apple. There is a very good chance that John moved to the garden. It is certain that if either Fred dropped the apple, or John moved to the garden, then Greg is a swan. It is almost certain that if Brian is a rhino, or John moved to the garden, then Lily is gray. It is almost certain that if Brian is a rhino, and Fred dropped the apple, then Bernhard is white.
hypothesis: It is impossible that fred dropped the apple, and Brian is a rhino.
valid_hypothesis: It is impossible that fred dropped the apple, and Brian is a rhino.
invalid_hypothesis: It is almost certain that fred dropped the apple, and Brian is a rhino.
hypothesis_assertion: Fred dropped the apple, and Brian is a rhino.