There is a better than even chance that Lily is a rhino. It is improbable that Brian is a swan. It is probably not the case that Mary dropped the apple.
There is a better than even chance that either Lily is a rhino, or Brian is a swan.
There is a better than even chance that either Lily is a rhino, or Brian is a swan.
There is little chance that either Lily is a rhino, or Brian is a swan.
Either Lily is a rhino, or Brian is a swan.