It is likely that John picked up the apple. It is certain that Julius is gray. Chances are about even that Brian is a lion. There is little chance that if John picked up the apple, or Brian is a lion, then Greg is a swan. There is little chance that if Julius is gray, and Brian is a lion, then Daniel dropped the milk. There is a very good chance that if either Julius is gray, or John picked up the apple, then Bernhard is green.
It is probably not the case that either John picked up the apple, or Bernhard is green.
It is almost certain that either John picked up the apple, or Bernhard is green.
It is probably not the case that either John picked up the apple, or Bernhard is green.
Either John picked up the apple, or Bernhard is green.