There is little chance that Lily is yellow. Chances are slight that Brian is a swan. Chances are about even that Greg is gray. It is improbable that if Greg is gray, or Brian is a swan, then John went to the office. It is improbable that if Greg is gray, and Brian is a swan, then Bernhard is a lion. It is impossible that if Lily is yellow, or Brian is a swan, then Sandra left the apple.
Chances are about even that either Greg is gray, or Sandra left the apple.
Chances are about even that either Greg is gray, or Sandra left the apple.
It is impossible that either Greg is gray, or Sandra left the apple.
Either Greg is gray, or Sandra left the apple.