context: Chances are about even that Lily is a frog. It is unlikely that Brian is white. We doubt that Bill moved to the garden. It is almost certain that if Bill moved to the garden, or Brian is white, then Sandra got the football. We believe that if Bill moved to the garden, and Lily is a frog, then Julius is a swan. It is probable that if Bill moved to the garden, or Brian is white, then Bernhard is gray.
hypothesis: We believe that brian is white, and Sandra got the football.
valid_hypothesis: It is unlikely that brian is white, and Sandra got the football.
invalid_hypothesis: We believe that brian is white, and Sandra got the football.
hypothesis_assertion: Brian is white, and Sandra got the football.