When it's done well, readers can understand fictional worlds and their rules just as well as the characters that live in them do and sometimes, just as well or even better than the reader understands the world outside of the book.
Kada se to radi dobro, čitatelji mogu razumjeti fikcijske svjetove i njihova pravila baš kao i likovi koji žive u njima i ponekad, jednako ili bolje nego što čitatelj shvaća svijet izvan knjige.