It is probably not the case that Greg is a rhino. Chances are about even that John got the apple. There is a very good chance that Brian is a swan. It is unlikely that if John got the apple, and Greg is a rhino, then Julius is a frog. It is impossible that if either Brian is a swan, or John got the apple, then Lily is gray. It is certain that if Brian is a swan, or Greg is a rhino, then Fred is in the office.
Chances are about even that either Lily is gray, or John got the apple.
Chances are about even that either Lily is gray, or John got the apple.
It is almost certain that either Lily is gray, or John got the apple.
Either Lily is gray, or John got the apple.