context: It is improbable that Greg is white. It is highly unlikely that Bernhard is a swan. It is unlikely that Brian is gray.
hypothesis: There is almost no chance that bernhard is a swan, and Brian is gray.
valid_hypothesis: There is almost no chance that bernhard is a swan, and Brian is gray.
invalid_hypothesis: It is probable that bernhard is a swan, and Brian is gray.
hypothesis_assertion: Bernhard is a swan, and Brian is gray.