context: We believe that Bernhard is a lion. It is probably the case that Brian is white. It is certain that Julius is a rhino.
hypothesis: It is certain that either Julius is a rhino, or Bernhard is a lion.
valid_hypothesis: It is probably not the case that either Julius is a rhino, or Bernhard is a lion.
invalid_hypothesis: It is certain that either Julius is a rhino, or Bernhard is a lion.
hypothesis_assertion: Either Julius is a rhino, or Bernhard is a lion.