context: It is impossible that Greg is gray. We believe that Bernhard is a swan. We doubt that Sandra grabbed the milk.
hypothesis: We believe that either Greg is gray, or Bernhard is a swan.
valid_hypothesis: We believe that either Greg is gray, or Bernhard is a swan.
invalid_hypothesis: It is improbable that either Greg is gray, or Bernhard is a swan.
hypothesis_assertion: Either Greg is gray, or Bernhard is a swan.