It is almost certain that John left the football. It is probably the case that Greg is yellow. There is a very good chance that Winona is a wolf. It is almost certain that if either John left the football, or Winona is a wolf, then Lily is a swan. It is probable that if either John left the football, or Winona is a wolf, then Bernhard is green. Chances are slight that if Winona is a wolf, and John left the football, then Fred is in the kitchen.
It is probably not the case that either Greg is yellow, or John left the football.
It is probably not the case that either Greg is yellow, or John left the football.
It is probable that either Greg is yellow, or John left the football.
Either Greg is yellow, or John left the football.