context: Chances are about even that Julius is a rhino. It is unlikely that Bernhard is a swan. We doubt that Sandra got the apple.
hypothesis: It is impossible that either Julius is a rhino, or Bernhard is a swan.
valid_hypothesis: Chances are about even that either Julius is a rhino, or Bernhard is a swan.
invalid_hypothesis: It is impossible that either Julius is a rhino, or Bernhard is a swan.
hypothesis_assertion: Either Julius is a rhino, or Bernhard is a swan.