It is probably the case that Gertrude is a cat. It is probable that Bill dropped the milk. Chances are slight that Bernhard is a lion. It is impossible that if either Bernhard is a lion, or Bill dropped the milk, then Brian is green. It is highly likely that if either Bill dropped the milk, or Bernhard is a lion, then Greg is a rhino. Chances are about even that if either Bill dropped the milk, or Gertrude is a cat, then John went to the garden.
There is a very good chance that john went to the garden, and Bill dropped the milk.
There is little chance that john went to the garden, and Bill dropped the milk.
There is a very good chance that john went to the garden, and Bill dropped the milk.
John went to the garden, and Bill dropped the milk.