context: We believe that Sandra grabbed the milk. It is highly likely that Lily is white. Chances are slight that Fred dropped the apple. It is highly likely that if Lily is white, and Sandra grabbed the milk, then Greg is green. There is almost no chance that if Lily is white, and Sandra grabbed the milk, then Bernhard is a swan. There is a very good chance that if Lily is white, and Sandra grabbed the milk, then John went to the kitchen.
hypothesis: It is highly unlikely that fred dropped the apple, or Lily is white.
valid_hypothesis: It is highly likely that fred dropped the apple, or Lily is white.
invalid_hypothesis: It is highly unlikely that fred dropped the apple, or Lily is white.
hypothesis_assertion: Fred dropped the apple, or Lily is white.