It is almost certain that John is in the bathroom. It is unlikely that Greg is a frog. There is a better than even chance that Daniel got the football.
We believe that either Greg is a frog, or John is in the bathroom.
We believe that either Greg is a frog, or John is in the bathroom.
It is probably not the case that either Greg is a frog, or John is in the bathroom.
Either Greg is a frog, or John is in the bathroom.