Unfortunately, in what is an incredibly predictable plot twist in The Silver Chair, just as Jill, Eustace, Puddleglum and Rilian are about to make their escape from the underworld, the Queen returns. As we find out later, she could have immediately turned into a serpent and tried to kill all four of her enemies, but in this situation, she decided to try to add to the confusion. They express their desire to return to the land of Narnia, but when she questioned them about how they would define the world they came from, they don’t have a solid answer for her. They cannot figure out how to irrefutably prove that the world exists.
Puddleglum eventually comes to the rescue again.
“Suppose we have only dreamed, or made up, all those things— trees and grass and sun and moon and stars and Aslan himself. Suppose we have. Then all I can say is that, in that case, the made-up things seem a good deal more important than the real ones. Suppose this black pit of a kingdom of yours is the only world. Well, it strikes me as a pretty poor one. And that’s a funny thing, when you come to think of it. We’re just babies making up a game, if you’re right. But four babies playing a game can make a play-world which licks your real world hollow. That’s why I’m going to stand by the play-world. I’m on Aslan’s side even if there isn’t any Aslan to lead it. I’m going to live as like a Narnian as I can even if there isn’t any Narnia.”
Although CS Lewis did not label it explicitly, this is the bane of postmodernism. When people begin to try to deny the existence of absolute truth, we fall into absurdity. When you try to deny all the things that are true and replace them with fabrications, the world simply does not make sense.
Nobody wants a world that is illogical, and that is the situation that our four heroes find themselves in if they buy into the lie perpetrated by the Queen. Even though they cannot necessarily describe why their own world is real, they know enough to understand that the world she is creating is nowhere near that which they understand and have experienced.
We all have lived in a world where absolute truth exists, so when we try to strip it down and create our postmodern paradise, we find a world without origin, meaning, morality or destiny to steal some phrases from Ravi Zacharias. Postmodernism simply fails because it cannot make the absolute statements that are necessary to answer any of these four questions. CS Lewis understood that even if many people don’t today.
 CS Lewis, “The Silver Chair” in The Chronicles of Narnia Complete 7-Book Collection with Bonus Book: Boxen (New York: HarperCollins, 2005), Kindle Locations 13496-13502, Kindle Edition.