The duplicates inside of the mental library worked in a hurry. They were doing their best to completely analyze the test that they were given. They had already extracted about a third of the instructions. There was a single duplicate in charge of completing each of these instructions, as well as narrowing things down to a single book.
The pyronian language, the language spoken in this realm, relied heavily on metaphors and certain trends in language, meaning that there were plenty of times where rather complex and usually unique sentences were carried over dozens and dozens of books as sayings. And the tower's overseer had chosen exactly such a saying as the test's solution. Since there were so many books that had this saying in them, it would be tough to narrow things down just based on this in order to bring the correct book to the overseer.
