context: It is certain that Lily is yellow. There is almost no chance that Mary went to the office. It is unlikely that Bernhard is gray. There is a very good chance that if Mary went to the office, or Bernhard is gray, then Bill got the milk there. There is almost no chance that if Bernhard is gray, or Mary went to the office, then Brian is white. There is a very good chance that if Mary went to the office, or Lily is yellow, then Emily is a mouse.
hypothesis: It is certain that bernhard is gray, and Brian is white.
valid_hypothesis: It is impossible that bernhard is gray, and Brian is white.
invalid_hypothesis: It is certain that bernhard is gray, and Brian is white.
hypothesis_assertion: Bernhard is gray, and Brian is white.