context: There is a very good chance that John got the milk. It is probably not the case that Winona is a mouse. There is a better than even chance that Brian is gray. We believe that if John got the milk, or Brian is gray, then Julius is a swan. Chances are about even that if either John got the milk, or Brian is gray, then Mary went to the hallway. It is certain that if either Brian is gray, or John got the milk, then Greg is a lion.
hypothesis: We believe that julius is a swan, and Mary went to the hallway.
valid_hypothesis: It is unlikely that julius is a swan, and Mary went to the hallway.
invalid_hypothesis: We believe that julius is a swan, and Mary went to the hallway.
hypothesis_assertion: Julius is a swan, and Mary went to the hallway.