context: We doubt that Lily is a swan. It is improbable that Greg is yellow. It is impossible that Julius is white.
hypothesis: We believe that either Julius is white, or Lily is a swan.
valid_hypothesis: It is unlikely that either Julius is white, or Lily is a swan.
invalid_hypothesis: We believe that either Julius is white, or Lily is a swan.
hypothesis_assertion: Either Julius is white, or Lily is a swan.