There is a better than even chance that Lily is gray. We believe that Brian is a frog. It is probably not the case that Jessica is a sheep.
Chances are about even that either Brian is a frog, or Lily is gray.
Chances are about even that either Brian is a frog, or Lily is gray.
It is highly unlikely that either Brian is a frog, or Lily is gray.
Either Brian is a frog, or Lily is gray.