It is probably not the case that Mary put down the milk. We doubt that Brian is a swan. We doubt that Sumit is tired. Chances are about even that if Mary put down the milk, or Sumit is tired, then Greg is a frog. It is almost certain that if either Sumit is tired, or Brian is a swan, then Daniel left the football. It is unlikely that if Mary put down the milk, and Sumit is tired, then Lily is white.
It is probably not the case that brian is a swan, or Daniel left the football.
It is probably not the case that brian is a swan, or Daniel left the football.
We believe that brian is a swan, or Daniel left the football.
Brian is a swan, or Daniel left the football.