context: It is probable that Bill went to the hallway. It is unlikely that Greg is green. It is probable that Bernhard is yellow. It is almost certain that if Greg is green, or Bernhard is yellow, then Julius is gray. We believe that if Greg is green, and Bill went to the hallway, then Sandra got the apple. There is a very good chance that if Bernhard is yellow, or Greg is green, then Lily is white.
hypothesis: It is certain that either Greg is green, or Julius is gray.
valid_hypothesis: Chances are about even that either Greg is green, or Julius is gray.
invalid_hypothesis: It is certain that either Greg is green, or Julius is gray.
hypothesis_assertion: Either Greg is green, or Julius is gray.