context: It is highly unlikely that Jeff went to the kitchen. It is likely that Lily is green. It is improbable that Bernhard is gray. Chances are slight that if Jeff went to the kitchen, or Lily is green, then Brian is a swan. There is a very good chance that if Bernhard is gray, or Lily is green, then John moved to the garden. It is probably not the case that if Bernhard is gray, and Lily is green, then Bill dropped the milk.
hypothesis: We doubt that brian is a swan, or Bernhard is gray.
valid_hypothesis: We doubt that brian is a swan, or Bernhard is gray.
invalid_hypothesis: It is almost certain that brian is a swan, or Bernhard is gray.
hypothesis_assertion: Brian is a swan, or Bernhard is gray.