context: It is almost certain that Bernhard is a rhino. It is almost certain that Brian is a swan. It is probable that John dropped the apple.
hypothesis: Chances are slight that either Brian is a swan, or Bernhard is a rhino.
valid_hypothesis: Chances are slight that either Brian is a swan, or Bernhard is a rhino.
invalid_hypothesis: It is probably the case that either Brian is a swan, or Bernhard is a rhino.
hypothesis_assertion: Either Brian is a swan, or Bernhard is a rhino.