context: It is certain that Brian is green. There is a very good chance that Bernhard is yellow. It is highly likely that Mary went to the kitchen. It is likely that if either Brian is green, or Mary went to the kitchen, then Gertrude is a mouse. We doubt that if either Bernhard is yellow, or Brian is green, then John moved to the office. There is a better than even chance that if Bernhard is yellow, and Brian is green, then Julius is a rhino.
hypothesis: It is impossible that bernhard is yellow, and Brian is green.
valid_hypothesis: There is a very good chance that bernhard is yellow, and Brian is green.
invalid_hypothesis: It is impossible that bernhard is yellow, and Brian is green.
hypothesis_assertion: Bernhard is yellow, and Brian is green.