context: Chances are slight that Bernhard is yellow. It is unlikely that Brian is gray. It is probable that Sandra left the milk. It is probably not the case that if Sandra left the milk, or Bernhard is yellow, then Gertrude is a mouse. It is likely that if either Bernhard is yellow, or Brian is gray, then Jeff discarded the apple. We doubt that if either Brian is gray, or Bernhard is yellow, then Mary went to the bedroom.
hypothesis: It is probably not the case that either Gertrude is a mouse, or Jeff discarded the apple.
valid_hypothesis: It is probably not the case that either Gertrude is a mouse, or Jeff discarded the apple.
invalid_hypothesis: It is certain that either Gertrude is a mouse, or Jeff discarded the apple.
hypothesis_assertion: Either Gertrude is a mouse, or Jeff discarded the apple.