"Explain to me why we're on this mission again?"
The wizard chuckled. Long experience had taught him that abstract thought was beyond the fighting class, but he did not mind indulging them. He flattered himself that an easy condescension was among his virtues.
"Some years ago, the wizard Azxerkak foolishly allowed himself to be encaptured by a certain magical tome prepared as a prison by his rival. That rival, fearing discovery, stashed the book away in a library contained in this very dungeon until he could safely return at a later date."
"So this wizard's caught, like in a cage?"
"And the cage is a book."
The fighter thought about this for a long moment. "So this wizard's caught in a prison, that's really a book in a library. So how do we know we're not caught in an even bigger book in some bigger wizard's library and he's reading that book right now?"
The wizard shook his head. "Tut, tut, my boy. The very idea is patently ridiculous."