Chances are about even that Bernhard is a swan. There is little chance that Brian is white. We believe that Julius is a rhino. It is probable that if Brian is white, and Bernhard is a swan, then Emily is a mouse. It is certain that if Bernhard is a swan, or Julius is a rhino, then Greg is gray. It is probably not the case that if Brian is white, or Bernhard is a swan, then Lily is green.
We doubt that either Lily is green, or Brian is white.
We doubt that either Lily is green, or Brian is white.
It is highly likely that either Lily is green, or Brian is white.
Either Lily is green, or Brian is white.