It is highly unlikely that Julius is a swan. We doubt that John moved to the garden. It is probably the case that Mary grabbed the apple.
It is probably not the case that julius is a swan, or John moved to the garden.
It is probably not the case that julius is a swan, or John moved to the garden.
There is a very good chance that julius is a swan, or John moved to the garden.
Julius is a swan, or John moved to the garden.