context: It is highly unlikely that Brian is a rhino. There is a very good chance that Bernhard is green. We doubt that Greg is gray. Chances are about even that if Brian is a rhino, or Bernhard is green, then Daniel grabbed the milk. It is impossible that if Greg is gray, or Brian is a rhino, then Sandra got the football. There is little chance that if Bernhard is green, and Brian is a rhino, then John went to the bedroom.
hypothesis: It is impossible that john went to the bedroom, and Daniel grabbed the milk.
valid_hypothesis: It is impossible that john went to the bedroom, and Daniel grabbed the milk.
invalid_hypothesis: It is probably the case that john went to the bedroom, and Daniel grabbed the milk.
hypothesis_assertion: John went to the bedroom, and Daniel grabbed the milk.