context: It is improbable that Sandra left the football. Chances are slight that Gertrude is a wolf. It is probable that Brian is gray.
hypothesis: We doubt that either Sandra left the football, or Gertrude is a wolf.
valid_hypothesis: We doubt that either Sandra left the football, or Gertrude is a wolf.
invalid_hypothesis: There is a very good chance that either Sandra left the football, or Gertrude is a wolf.
hypothesis_assertion: Either Sandra left the football, or Gertrude is a wolf.