There is little chance that Brian is gray. We doubt that Lily is a swan. There is a very good chance that John discarded the apple. It is highly likely that if Lily is a swan, and John discarded the apple, then Julius is a rhino. There is a very good chance that if either Lily is a swan, or John discarded the apple, then Mary went to the bedroom. There is a better than even chance that if Lily is a swan, and John discarded the apple, then Winona is a mouse.
We believe that either John discarded the apple, or Brian is gray.
We believe that either John discarded the apple, or Brian is gray.
There is almost no chance that either John discarded the apple, or Brian is gray.
Either John discarded the apple, or Brian is gray.