context: It is impossible that Bernhard is a rhino. It is probably not the case that Brian is a swan. There is almost no chance that John left the milk.
hypothesis: It is certain that bernhard is a rhino, and Brian is a swan.
valid_hypothesis: It is impossible that bernhard is a rhino, and Brian is a swan.
invalid_hypothesis: It is certain that bernhard is a rhino, and Brian is a swan.
hypothesis_assertion: Bernhard is a rhino, and Brian is a swan.