context: We doubt that Lily is green. It is almost certain that Gertrude is a wolf. We believe that Sandra put down the milk. We believe that if Lily is green, and Sandra put down the milk, then Greg is a lion. It is impossible that if Lily is green, or Gertrude is a wolf, then John left the football. It is probable that if Gertrude is a wolf, and Sandra put down the milk, then Julius is a rhino.
hypothesis: It is certain that either Julius is a rhino, or Lily is green.
valid_hypothesis: Chances are about even that either Julius is a rhino, or Lily is green.
invalid_hypothesis: It is certain that either Julius is a rhino, or Lily is green.
hypothesis_assertion: Either Julius is a rhino, or Lily is green.