There is a better than even chance that Bernhard is gray. Chances are about even that Greg is a lion. Chances are about even that John went to the garden.
Chances are about even that either Greg is a lion, or Bernhard is gray.
Chances are about even that either Greg is a lion, or Bernhard is gray.
It is impossible that either Greg is a lion, or Bernhard is gray.
Either Greg is a lion, or Bernhard is gray.