context: Chances are about even that Sandra took the milk. It is highly unlikely that Brian is a swan. It is highly unlikely that Lily is yellow. Chances are about even that if either Sandra took the milk, or Lily is yellow, then Emily is a mouse. There is a better than even chance that if Brian is a swan, or Sandra took the milk, then John went to the bedroom. We believe that if either Lily is yellow, or Brian is a swan, then Bernhard is a rhino.
hypothesis: It is certain that bernhard is a rhino, and John went to the bedroom.
valid_hypothesis: There is almost no chance that bernhard is a rhino, and John went to the bedroom.
invalid_hypothesis: It is certain that bernhard is a rhino, and John went to the bedroom.
hypothesis_assertion: Bernhard is a rhino, and John went to the bedroom.