context: Chances are slight that Mary grabbed the milk. We doubt that John went to the bedroom. It is likely that Lily is a rhino.
hypothesis: There is almost no chance that mary grabbed the milk, and John went to the bedroom.
valid_hypothesis: There is almost no chance that mary grabbed the milk, and John went to the bedroom.
invalid_hypothesis: Chances are about even that mary grabbed the milk, and John went to the bedroom.
hypothesis_assertion: Mary grabbed the milk, and John went to the bedroom.