We doubt that Brian is a lion. It is probably not the case that Greg is a frog. There is little chance that Mary moved to the garden. It is unlikely that if Greg is a frog, and Brian is a lion, then Julius is white. It is probably the case that if either Brian is a lion, or Mary moved to the garden, then Fred went to the kitchen. It is highly likely that if either Greg is a frog, or Brian is a lion, then John picked up the apple.
It is probably not the case that either John picked up the apple, or Mary moved to the garden.
It is probably not the case that either John picked up the apple, or Mary moved to the garden.
It is certain that either John picked up the apple, or Mary moved to the garden.
Either John picked up the apple, or Mary moved to the garden.