context: We doubt that Mary went to the hallway. We doubt that Bernhard is a swan. It is likely that Brian is yellow. There is almost no chance that if Bernhard is a swan, or Brian is yellow, then John dropped the apple. There is almost no chance that if Brian is yellow, and Bernhard is a swan, then Antoine is bored. There is a better than even chance that if either Bernhard is a swan, or Mary went to the hallway, then Greg is a frog.
hypothesis: There is a better than even chance that bernhard is a swan, and Greg is a frog.
valid_hypothesis: Chances are slight that bernhard is a swan, and Greg is a frog.
invalid_hypothesis: There is a better than even chance that bernhard is a swan, and Greg is a frog.
hypothesis_assertion: Bernhard is a swan, and Greg is a frog.