context: It is highly unlikely that Brian is green. It is probably the case that Greg is white. It is improbable that Lily is a swan. We believe that if either Greg is white, or Lily is a swan, then Julius is a rhino. There is a better than even chance that if Brian is green, or Greg is white, then Mary grabbed the milk. It is highly unlikely that if Lily is a swan, or Brian is green, then Daniel left the apple.
hypothesis: There is a very good chance that mary grabbed the milk, and Lily is a swan.
valid_hypothesis: It is highly unlikely that mary grabbed the milk, and Lily is a swan.
invalid_hypothesis: There is a very good chance that mary grabbed the milk, and Lily is a swan.
hypothesis_assertion: Mary grabbed the milk, and Lily is a swan.