Morpheus cannot rule out this sort of scenario. All he can say is that his experiences in Zion and on the Nebuchadnezzar do not feel like a dream, and that the belief that he has “really awakened” is consistent with all of his experiences. But notice that the same was true for Neo before he took the red pill. His experience felt real, and, until he found himself naked inside that slimy cocoon, it made perfect sense for him to believe that he had been experiencing the real world all of his life.
So the pit of skepticism certainly goes deeper than even Morpheus realizes. For this reason, Descartes may be a better guide. He was prepared to follow his skeptical doubts all the way down. Ultimately, Descartes faced the possibility that maybe there is nothing at all that is absolutely certain. But after closely examining this possibility, he came to the realization that he did know at least one thing with absolute certainty. Descartes came to this insight when he tried to entertain the notion that the demon was deceiving him about his own existence:
I have convinced myself that there is nothing in the world – no sky, no earth, no minds, no bodies. Does not it follow that I do not exist? No, surely I must exist if it's me who is convinced of something. Let him deceive me all he can, he will never make it the case that I am nothing while I think that I am something.10
Descartes summarized this conclusion in the Latin phrase Cogito ergo sum – “I think therefore I am” – which has long remained the single most famous line in all of Western philosophy.11
It seems to me that Descartes was right. One cannot be mistaken about one's very existence. Even if you are a victim of a Matrix‐type deception you can be certain that you exist. That is, there has to be a “you” that is being deceived. While everyone else's existence will always be somewhat less certain, the very act of trying to doubt your own existence merely demonstrates that you indeed exist. Of course, you cannot then start jumping to conclusions about what you are, or what the external world is really like. You still cannot be sure that you have a body, or that you are even human. (For all you know, you might be a sentient machine or robot that is deceived into thinking that it is human.) But the certainty of your existence does provide a foothold – a starting point for trying to climb out of this pit. As Descartes noted:
Archimedes required only one fixed and immovable point to move the whole earth from its place, and I too can hope for great things if I can find even one small thing that is certain and unshakeable.12
Since it was your ability to think that proved your existence, then perhaps you can build on that. For, if you are at this very moment “thinking of the Matrix,” is not it also certain that you know that you are “thinking of the Matrix”? It seems undeniably true that you are directly and unmistakably aware of your own immediate conscious mental state. Similarly, if you are perceiving a white page in front of you, you know that you are perceiving a white page in front of you. You just cannot jump to the conclusion that the page is “real,” in the sense that it has a separate existence apart from your perception. Not only do you have a direct awareness of your own thoughts and perceptions, but as Descartes put it, you know that you are a “thinking thing,” that is, you are the kind of being that is capable of having these thoughts and perceptions. This is not to say that you are the original source of these thoughts. It is always possible that they are somehow “pumped into your mind” from the outside. But regardless of the manner in which they arise, you must be capable of experiencing them.
So how deep does the rabbit hole really go? “Frighteningly deep” is the short answer. So long as you are willing to entertain the possibility of a Matrix‐type deception, then the only thing that you can be absolutely sure of is your own existence and the contents of your immediate mental state. Certainty about what the world is like outside your mind will always be unavailable to you. This conclusion does not sit very well with most people. And it did not for Descartes either. He tried to eliminate the possibility of such radical deceptions by proving that God exists. His thought was that if he could prove the existence of God as an all‐good and all‐powerful being, then he could rest assured that there was no malicious demon, for surely a benevolent God would not allow him to be deceived about his most clear and distinct perceptions. Unfortunately for Descartes, most philosophers agree that his argument for God fell short of the “proof” that he needed. In the end there may be no way to be absolutely certain that we are not the victims of a Matrix‐type deception.
Skepticism Outside the Matrix
How do you define real?
– Morpheus†
While we may not be able to prove that we are not in a Matrix‐type deception right now, this, of course, does not mean that we ought to believe that we are in the Matrix. While the Matrix scenario is a logical possibility, it is not the most likely explanation of our day‐to‐day experiences. And since Descartes's journey has shown that there is very little that we can know with absolute certainty, maybe we should lower our standards. After all, to be very certain about your beliefs is probably good enough for knowledge.
Shifting the standard from absolute certainty to merely a high degree of probability will not free us from skepticism – though many people mistakenly think that it does. They quickly fall into complacency and assume that they are very certain that the world is essentially just like it appears to be. They suppose that the images in our minds (coming to us through our senses) of smooth, solid, brown tables, soft, fuzzy, beige carpeting, and squishy, pink, bubblegum basically correspond to the world as it is outside our minds – reality in itself. This view, that the world outside our minds basically matches our perceptions of it, is called naive realism. While this view is quite common, there are plenty of reasons to think that it is false. The world is NOT just as it appears to be. Philosophers throughout history have argued this point, but in what follows I'll argue the case in a way that is inspired by the great twentieth‐century philosopher Bertrand Russell.13
Suppose that I have purchased from Warner Brothers those big red chairs that Morpheus and Neo sat in during their first meeting. Imagine that I have invited you over and that you sit down in one of them. Let us be clear that in this example we are talking about a “real” chair. We are in my real living‐room – not in some Matrix‐type simulation, or in a film, but in real life. As you imagine yourself sitting there, think about what you would know with reasonable certainty about the chair. First off, if you are like most people, you will take it for granted that the chair exists. But what Russell asks us to do is to take seriously the seemingly stupid question: How do you know it exists? In a way that is reminiscent of Morpheus's own remarks, you would probably respond by saying that it exists because you feel it, see it, etc. You feel its support against your back; you run your hand across its smooth leather surface, feeling the contour of its shape; and you see its deep red color.
But