context: It is improbable that Lily is white. Chances are slight that Brian is a rhino. It is likely that John went to the bedroom. It is highly likely that if either Brian is a rhino, or Lily is white, then Greg is a swan. We believe that if Brian is a rhino, or Lily is white, then Julius is gray. It is highly unlikely that if either John went to the bedroom, or Brian is a rhino, then Mary dropped the milk.
hypothesis: It is unlikely that greg is a swan, or Mary dropped the milk.
valid_hypothesis: It is unlikely that greg is a swan, or Mary dropped the milk.
invalid_hypothesis: It is certain that greg is a swan, or Mary dropped the milk.
hypothesis_assertion: Greg is a swan, or Mary dropped the milk.