context: It is certain that Fred is in the park. It is highly likely that Lily is green. We believe that Brian is gray. It is probable that if either Fred is in the park, or Lily is green, then Greg is white. It is improbable that if either Fred is in the park, or Brian is gray, then Julius is a frog. It is probably the case that if Lily is green, and Brian is gray, then Bernhard is a rhino.
hypothesis: It is certain that greg is white, or Bernhard is a rhino.
valid_hypothesis: Chances are about even that greg is white, or Bernhard is a rhino.
invalid_hypothesis: It is certain that greg is white, or Bernhard is a rhino.
hypothesis_assertion: Greg is white, or Bernhard is a rhino.