context: It is highly likely that Bernhard is yellow. There is almost no chance that Brian is a lion. It is highly likely that Lily is white. We believe that if Brian is a lion, or Lily is white, then Sandra left the apple. It is probable that if Brian is a lion, and Bernhard is yellow, then Daniel put down the milk. Chances are about even that if Lily is white, or Brian is a lion, then Mary got the football.
hypothesis: It is probable that sandra left the apple, and Brian is a lion.
valid_hypothesis: There is almost no chance that sandra left the apple, and Brian is a lion.
invalid_hypothesis: It is probable that sandra left the apple, and Brian is a lion.
hypothesis_assertion: Sandra left the apple, and Brian is a lion.