context: It is highly likely that John dropped the apple. There is a better than even chance that Bernhard is a swan. It is likely that Gertrude is a wolf.
hypothesis: Chances are about even that bernhard is a swan, and John dropped the apple.
valid_hypothesis: Chances are about even that bernhard is a swan, and John dropped the apple.
invalid_hypothesis: It is impossible that bernhard is a swan, and John dropped the apple.
hypothesis_assertion: Bernhard is a swan, and John dropped the apple.