context: It is probably not the case that John went to the bedroom. It is highly likely that Brian is gray. There is a better than even chance that Julius is a lion. It is probably the case that if John went to the bedroom, and Brian is gray, then Lily is gray. It is probable that if Brian is gray, or John went to the bedroom, then Sandra got the football. There is a very good chance that if John went to the bedroom, or Brian is gray, then Gertrude is a mouse.
hypothesis: Chances are about even that either John went to the bedroom, or Sandra got the football.
valid_hypothesis: Chances are about even that either John went to the bedroom, or Sandra got the football.
invalid_hypothesis: There is almost no chance that either John went to the bedroom, or Sandra got the football.
hypothesis_assertion: Either John went to the bedroom, or Sandra got the football.