context: It is impossible that Bernhard is a swan. It is probable that Julius is gray. It is unlikely that Greg is a rhino.
hypothesis: We doubt that greg is a rhino, or Julius is gray.
valid_hypothesis: We believe that greg is a rhino, or Julius is gray.
invalid_hypothesis: We doubt that greg is a rhino, or Julius is gray.
hypothesis_assertion: Greg is a rhino, or Julius is gray.