context: Chances are slight that Mary put down the milk. There is a better than even chance that Brian is a swan. We doubt that John went to the bedroom. It is unlikely that if either John went to the bedroom, or Brian is a swan, then Sandra left the football. It is highly likely that if either Mary put down the milk, or John went to the bedroom, then Lily is gray. It is probably the case that if Brian is a swan, or Mary put down the milk, then Julius is white.
hypothesis: There is almost no chance that sandra left the football, and John went to the bedroom.
valid_hypothesis: There is almost no chance that sandra left the football, and John went to the bedroom.
invalid_hypothesis: There is a very good chance that sandra left the football, and John went to the bedroom.
hypothesis_assertion: Sandra left the football, and John went to the bedroom.