It is improbable that Brian is gray. It is probably the case that Julius is a swan. It is improbable that Greg is a lion. There is a better than even chance that if either Greg is a lion, or Brian is gray, then John moved to the garden. It is improbable that if Brian is gray, and Julius is a swan, then Lily is green. It is highly unlikely that if Brian is gray, or Julius is a swan, then Jessica is a mouse.
It is improbable that either Lily is green, or Brian is gray.
It is improbable that either Lily is green, or Brian is gray.
It is almost certain that either Lily is green, or Brian is gray.
Either Lily is green, or Brian is gray.