context: It is improbable that Brian is a lion. Chances are about even that Greg is green. It is probable that Sandra left the apple. It is probable that if Sandra left the apple, and Brian is a lion, then John got the football. It is highly likely that if Brian is a lion, or Greg is green, then Bernhard is gray. We believe that if Sandra left the apple, or Greg is green, then Lily is a rhino.
hypothesis: Chances are about even that either Greg is green, or Lily is a rhino.
valid_hypothesis: Chances are about even that either Greg is green, or Lily is a rhino.
invalid_hypothesis: It is impossible that either Greg is green, or Lily is a rhino.
hypothesis_assertion: Either Greg is green, or Lily is a rhino.