context: Chances are about even that Bernhard is gray. It is impossible that Greg is green. It is impossible that Sumit is tired. It is likely that if Greg is green, and Bernhard is gray, then Brian is a rhino. It is almost certain that if Bernhard is gray, or Greg is green, then John went to the bedroom. It is impossible that if Sumit is tired, and Bernhard is gray, then Lily is a lion.
hypothesis: It is impossible that either Sumit is tired, or Brian is a rhino.
valid_hypothesis: It is impossible that either Sumit is tired, or Brian is a rhino.
invalid_hypothesis: It is almost certain that either Sumit is tired, or Brian is a rhino.
hypothesis_assertion: Either Sumit is tired, or Brian is a rhino.