context: There is a better than even chance that John dropped the apple. We doubt that Brian is a swan. It is probably not the case that Greg is green. It is highly likely that if John dropped the apple, and Brian is a swan, then Antoine is hungry. We doubt that if Greg is green, and John dropped the apple, then Bernhard is gray. Chances are slight that if Greg is green, or John dropped the apple, then Lily is a frog.
hypothesis: Chances are about even that bernhard is gray, and Brian is a swan.
valid_hypothesis: It is impossible that bernhard is gray, and Brian is a swan.
invalid_hypothesis: Chances are about even that bernhard is gray, and Brian is a swan.
hypothesis_assertion: Bernhard is gray, and Brian is a swan.