It is certain that Brian is a rhino. It is improbable that Bill moved to the garden. It is highly unlikely that Mary went to the hallway. It is improbable that if Brian is a rhino, or Mary went to the hallway, then Sandra grabbed the milk. We doubt that if Brian is a rhino, and Bill moved to the garden, then Emily is a mouse. There is little chance that if either Mary went to the hallway, or Brian is a rhino, then Greg is yellow.
Chances are slight that mary went to the hallway, or Sandra grabbed the milk.
Chances are slight that mary went to the hallway, or Sandra grabbed the milk.
There is a better than even chance that mary went to the hallway, or Sandra grabbed the milk.
Mary went to the hallway, or Sandra grabbed the milk.