Some say that we live in a computer simulation, and that we just don’t know it yet. Perhaps God-like creatures, on another planet somewhere, have colonised us and put us in Matrix-style liquid-filled pods, our brains attached to a computer and fed with fake experiences. Proponents of the simulation hypothesis rightly point out that it may be wrong to call such experiences “fake”. We do have them after all, and whether these experiences come from a real world interacting with us or from a computer program pretending to be a world doesn’t make a lot of difference as long as we don’t know the truth of the matter. “Truth” may be a similarly slippery concept. (Nozick’s experience machine is a whole different case, because in that thought experiment the point is whether we would choose to live in such a machine. Here we assume that we don’t have such a choice).
Elon Musk has recently popularised the simulation hypothesis, although it’s centuries old. Descartes’ “dieu trompeur” is a famous example: an evil demon presenting a complete illusion of an external world to our senses, or maybe directly to our minds, or mind in the singular.
Whatever the merits of this hypothesis, I think they pale in comparison to another one: we are, in fact, already dead. The latter is, in my opinion, much more likely and fits better with the available evidence. Let me have a go.
The simulation hypothesis can indeed explain all the evidence – since all evidence is facts and all facts can conceivably be simulated by some or other entity. The problem however is precisely this entity. Who or what could it be? The most likely explanation is that the simulating entity is part of humanity itself, perhaps a future generation. But why? Why on earth (or elsewhere) would they enslave physical human bodies, put them to sleep, immerse them in vats and connect them to computers in order to feed them sensations of a non-existing world? Why would they remove their brains or emulate their brains? I don’t see the point. The Matrix plot – humans as a power source – is obviously ridiculous. Emulated brains as instruments of computing power is a similarly weak rationale for the simulation hypothesis (when it becomes technologically possible to emulate brains, there won’t be a reason to fool them; just use their computing power if you don’t have better, non-brain based computing machines, which seems unlikely to me). The same lack of rationale applies to the possibility of aliens or Gods as simulating entities. It seems likely that they as well, just like future humans, would have better things to do.
Whomever is the simulating entity, it must have a reason for its actions. Even the fun of it or outright sadism could not support the simulation hypothesis: it wouldn’t be much fun to the simulators, not even if they’re sadists: our possibly simulated world is often awful but not awful enough to be the product of a sadist entity seeking to enjoy itself at our expense.
So the evidence seems to be against the simulation hypothesis. What about my alternative? Let’s call it the Cotard hypothesis after the well-known Cotard delusion: a mental illness in which the affected person holds the delusional belief that he or she is already dead. Although of course in this case we’re not dealing with a delusion. The delusion would be that we’re still alive.
Think about unrequited love, the glances in the subway that went unnoticed, the promotion that you failed to get, the times that your husband ignored what you were saying… Often trivial and banal occurrences, but taken together they may have some weight. Perhaps more weight than the simulation hypothesis. Countervailing evidence can also be explained. The times when you weren’t ignored may have been wishful thinking. After all, it’s easier to believe that you are alive than that you are dead, and so your mind may fabricate “evidence” to convince you that you are in fact alive. Such fabrications are not unheard of: there’s the just world fallacy, we have adaptive preferences and suffer from confirmation bias. And a lot of these biases are unconscious.
Think also about the sadness of some of the memories of early childhood. Good memories maybe, but also sad at the same time because that world is gone, that life is gone. Your life is gone. This fits also nicely with the increasingly popular notion that there is no such thing as en enduring personal identity. We “die” every moment.