We believe that John picked up the apple. Chances are slight that Lily is a swan. We believe that Julius is gray. We believe that if Julius is gray, or Lily is a swan, then Jessica is a sheep. It is probably not the case that if Julius is gray, or John picked up the apple, then Brian is green. It is certain that if Lily is a swan, or Julius is gray, then Mary went to the garden.
We doubt that brian is green, and John picked up the apple.
We doubt that brian is green, and John picked up the apple.
It is probably the case that brian is green, and John picked up the apple.
Brian is green, and John picked up the apple.