context: It is certain that Brian is a swan. It is unlikely that Lily is white. It is almost certain that Mary went to the hallway. It is highly likely that if either Lily is white, or Mary went to the hallway, then Julie is in the bedroom. It is unlikely that if either Brian is a swan, or Lily is white, then Daniel dropped the apple. We believe that if Lily is white, and Brian is a swan, then Bill moved to the office.
hypothesis: It is improbable that mary went to the hallway, and Brian is a swan.
valid_hypothesis: It is almost certain that mary went to the hallway, and Brian is a swan.
invalid_hypothesis: It is improbable that mary went to the hallway, and Brian is a swan.
hypothesis_assertion: Mary went to the hallway, and Brian is a swan.