It is probably the case that John went to the garden. We believe that Julius is a swan. It is almost certain that Brian is white. It is improbable that if John went to the garden, or Julius is a swan, then Lily is yellow. It is highly unlikely that if either John went to the garden, or Brian is white, then Emily is a mouse. It is highly likely that if Brian is white, and John went to the garden, then Fred is in the office.
It is probably not the case that either Brian is white, or Lily is yellow.
It is highly likely that either Brian is white, or Lily is yellow.
It is probably not the case that either Brian is white, or Lily is yellow.
Either Brian is white, or Lily is yellow.