Principle: Anyone who has more than one overdue book out on loan from the library at the same time must be fined if some of the overdue books are not children' s books and that person has previously been fined for overdue books
Application: Since three of the books that Kessler currently has out on loan from the library are overdue, Kessler must be fined
One of the overdue books that Kessler currently has out on loan from the library is a novel for adults, and Kessler was fined last year for returning this book late.