It is certain that Sandra left the milk. It is probable that Greg is a swan. It is probable that Brian is yellow. It is likely that if Sandra left the milk, and Brian is yellow, then Julius is a frog. It is probably the case that if either Brian is yellow, or Greg is a swan, then Mary got the apple. It is unlikely that if Brian is yellow, and Greg is a swan, then Jeff discarded the milk.
Chances are about even that either Jeff discarded the milk, or Mary got the apple.
Chances are about even that either Jeff discarded the milk, or Mary got the apple.
It is highly unlikely that either Jeff discarded the milk, or Mary got the apple.
Either Jeff discarded the milk, or Mary got the apple.