We doubt that Greg is a rhino. It is improbable that Lily is a frog. It is highly likely that Sandra took the milk. It is probably the case that if either Sandra took the milk, or Greg is a rhino, then Brian is gray. Chances are about even that if Lily is a frog, and Sandra took the milk, then Fred dropped the apple. There is a very good chance that if either Sandra took the milk, or Greg is a rhino, then Mary went to the bedroom.
Chances are about even that either Brian is gray, or Sandra took the milk.
Chances are about even that either Brian is gray, or Sandra took the milk.
It is almost certain that either Brian is gray, or Sandra took the milk.
Either Brian is gray, or Sandra took the milk.