context: It is probably the case that Lily is white. There is a very good chance that Yann got the milk there. There is a better than even chance that Greg is a swan. There is a better than even chance that if Lily is white, or Greg is a swan, then Brian is gray. It is highly unlikely that if Lily is white, and Greg is a swan, then Mary went to the bedroom. We doubt that if Yann got the milk there, or Lily is white, then Julius is a rhino.
hypothesis: We doubt that mary went to the bedroom, or Julius is a rhino.
valid_hypothesis: We doubt that mary went to the bedroom, or Julius is a rhino.
invalid_hypothesis: It is certain that mary went to the bedroom, or Julius is a rhino.
hypothesis_assertion: Mary went to the bedroom, or Julius is a rhino.