context: Chances are about even that Mary went to the hallway. We believe that Bernhard is a lion. It is unlikely that Lily is a swan. We believe that if Mary went to the hallway, or Lily is a swan, then Sandra grabbed the milk. It is unlikely that if either Bernhard is a lion, or Mary went to the hallway, then Greg is yellow. It is certain that if Lily is a swan, or Mary went to the hallway, then John put down the apple.
hypothesis: There is a very good chance that john put down the apple, and Lily is a swan.
valid_hypothesis: We doubt that john put down the apple, and Lily is a swan.
invalid_hypothesis: There is a very good chance that john put down the apple, and Lily is a swan.
hypothesis_assertion: John put down the apple, and Lily is a swan.