context: It is highly unlikely that Lily is a swan. It is almost certain that Daniel took the football. It is probably the case that Bill got the milk there. There is a better than even chance that if Daniel took the football, or Bill got the milk there, then Bernhard is gray. Chances are about even that if Bill got the milk there, or Lily is a swan, then John went to the bedroom. There is little chance that if Bill got the milk there, and Daniel took the football, then Brian is white.
hypothesis: Chances are about even that bill got the milk there, and Brian is white.
valid_hypothesis: It is highly unlikely that bill got the milk there, and Brian is white.
invalid_hypothesis: Chances are about even that bill got the milk there, and Brian is white.
hypothesis_assertion: Bill got the milk there, and Brian is white.