context: There is almost no chance that Brian is a lion. There is a very good chance that Bernhard is gray. There is a very good chance that Sandra left the apple. We doubt that if either Bernhard is gray, or Sandra left the apple, then Greg is a swan. It is certain that if either Brian is a lion, or Sandra left the apple, then John went to the kitchen. It is highly unlikely that if Brian is a lion, or Bernhard is gray, then Lily is a frog.
hypothesis: There is a very good chance that either Greg is a swan, or Sandra left the apple.
valid_hypothesis: There is a very good chance that either Greg is a swan, or Sandra left the apple.
invalid_hypothesis: Chances are slight that either Greg is a swan, or Sandra left the apple.
hypothesis_assertion: Either Greg is a swan, or Sandra left the apple.