context: Chances are about even that Julius is gray. We believe that Brian is green. It is highly unlikely that Greg is a rhino.
hypothesis: We believe that either Greg is a rhino, or Brian is green.
valid_hypothesis: We believe that either Greg is a rhino, or Brian is green.
invalid_hypothesis: We doubt that either Greg is a rhino, or Brian is green.
hypothesis_assertion: Either Greg is a rhino, or Brian is green.