There is a better than even chance that Greg is white. It is probable that Brian is a swan. We doubt that Lily is green. There is almost no chance that if Lily is green, or Greg is white, then Bernhard is a frog. It is highly unlikely that if Greg is white, and Brian is a swan, then John discarded the apple. It is impossible that if Greg is white, and Lily is green, then Mary is in the garden.
It is probably not the case that john discarded the apple, or Brian is a swan.
It is probably the case that john discarded the apple, or Brian is a swan.
It is probably not the case that john discarded the apple, or Brian is a swan.
John discarded the apple, or Brian is a swan.