It is probably not the case that Mary went to the garden. It is highly unlikely that Sandra grabbed the apple. There is a better than even chance that Bernhard is a rhino. We doubt that if Mary went to the garden, and Bernhard is a rhino, then Greg is white. It is impossible that if either Mary went to the garden, or Bernhard is a rhino, then Brian is a lion. It is unlikely that if Sandra grabbed the apple, or Bernhard is a rhino, then Lily is gray.
It is impossible that sandra grabbed the apple, and Greg is white.
It is impossible that sandra grabbed the apple, and Greg is white.
Chances are about even that sandra grabbed the apple, and Greg is white.
Sandra grabbed the apple, and Greg is white.