It is unlikely that Fred is in the bedroom. It is probably not the case that Gertrude is a mouse. It is improbable that Bernhard is a swan. It is improbable that if Bernhard is a swan, or Fred is in the bedroom, then John got the milk. There is little chance that if either Gertrude is a mouse, or Bernhard is a swan, then Lily is white. It is likely that if Fred is in the bedroom, or Bernhard is a swan, then Mary went to the kitchen.
It is highly likely that either John got the milk, or Fred is in the bedroom.
We doubt that either John got the milk, or Fred is in the bedroom.
It is highly likely that either John got the milk, or Fred is in the bedroom.
Either John got the milk, or Fred is in the bedroom.