It is highly unlikely that Sandra left the apple. It is impossible that Brian is gray. We doubt that Bernhard is a lion. It is probably the case that if Sandra left the apple, and Bernhard is a lion, then Mary is in the cinema. It is impossible that if either Bernhard is a lion, or Sandra left the apple, then Jessica is a wolf. Chances are about even that if either Sandra left the apple, or Bernhard is a lion, then Bill went to the garden.
It is improbable that either Brian is gray, or Bill went to the garden.
It is improbable that either Brian is gray, or Bill went to the garden.
It is almost certain that either Brian is gray, or Bill went to the garden.
Either Brian is gray, or Bill went to the garden.