context: We believe that Bernhard is a swan. It is certain that Julius is gray. Chances are slight that Lily is white.
hypothesis: It is probably not the case that either Julius is gray, or Bernhard is a swan.
valid_hypothesis: It is probably not the case that either Julius is gray, or Bernhard is a swan.
invalid_hypothesis: It is likely that either Julius is gray, or Bernhard is a swan.
hypothesis_assertion: Either Julius is gray, or Bernhard is a swan.