It is probably the case that Gertrude is a mouse. It is likely that Julius is yellow. It is improbable that Brian is green. Chances are slight that if Gertrude is a mouse, and Julius is yellow, then Lily is a frog. There is little chance that if Gertrude is a mouse, and Brian is green, then Sandra grabbed the milk. We believe that if Gertrude is a mouse, or Julius is yellow, then Emily is a sheep.
There is little chance that either Sandra grabbed the milk, or Brian is green.
There is little chance that either Sandra grabbed the milk, or Brian is green.
It is almost certain that either Sandra grabbed the milk, or Brian is green.
Either Sandra grabbed the milk, or Brian is green.