context: It is almost certain that Greg is a swan. It is impossible that John went to the hallway. We doubt that Bernhard is yellow.
hypothesis: We believe that either Greg is a swan, or Bernhard is yellow.
valid_hypothesis: We believe that either Greg is a swan, or Bernhard is yellow.
invalid_hypothesis: It is highly unlikely that either Greg is a swan, or Bernhard is yellow.
hypothesis_assertion: Either Greg is a swan, or Bernhard is yellow.