There is little chance that Mary left the apple. We believe that John is in the hallway. It is highly likely that Greg is a lion. It is highly likely that if Greg is a lion, and Mary left the apple, then Julius is a swan. It is probably the case that if Mary left the apple, and John is in the hallway, then Jeff went to the garden. Chances are slight that if either Greg is a lion, or John is in the hallway, then Brian is a rhino.
It is probably not the case that either Jeff went to the garden, or John is in the hallway.
It is probable that either Jeff went to the garden, or John is in the hallway.
It is probably not the case that either Jeff went to the garden, or John is in the hallway.
Either Jeff went to the garden, or John is in the hallway.