context: It is likely that John went to the bedroom. It is probably not the case that Winona is a wolf. Chances are about even that Sandra grabbed the milk. There is a very good chance that if Winona is a wolf, and Sandra grabbed the milk, then Daniel left the football. Chances are slight that if either Sandra grabbed the milk, or John went to the bedroom, then Brian is gray. It is probably the case that if John went to the bedroom, or Winona is a wolf, then Julius is a lion.
hypothesis: It is certain that either Brian is gray, or Julius is a lion.
valid_hypothesis: Chances are about even that either Brian is gray, or Julius is a lion.
invalid_hypothesis: It is certain that either Brian is gray, or Julius is a lion.
hypothesis_assertion: Either Brian is gray, or Julius is a lion.