There is a better than even chance that Greg is a frog. There is little chance that Brian is green. There is a very good chance that Lily is gray. It is highly likely that if Lily is gray, and Greg is a frog, then Mary dropped the milk. It is impossible that if either Brian is green, or Greg is a frog, then Sandra took the football. There is almost no chance that if Brian is green, or Lily is gray, then John picked up the apple.
It is highly unlikely that either Greg is a frog, or Lily is gray.
Chances are about even that either Greg is a frog, or Lily is gray.
It is highly unlikely that either Greg is a frog, or Lily is gray.
Either Greg is a frog, or Lily is gray.