context: There is almost no chance that Greg is a swan. There is almost no chance that Bernhard is yellow. There is almost no chance that Brian is gray.
hypothesis: It is impossible that bernhard is yellow, and Brian is gray.
valid_hypothesis: It is impossible that bernhard is yellow, and Brian is gray.
invalid_hypothesis: There is a very good chance that bernhard is yellow, and Brian is gray.
hypothesis_assertion: Bernhard is yellow, and Brian is gray.