THE NOTION THAT WE’RE ALL JUST COMPUTER simulations living in a simulated universe—once the stuff of late-night college dormitory bull sessions— has now resurfaced, having been espoused by (among other eminences) a world-famous astrophysicist and an Internet entrepreneur billionaire.
Illustration by Ástor Alexander
The notion is the latest manifestation of what was perhaps was first contemplated (and then, at least to his own satisfaction, disproved) by Descartes, whose cogito, ergo sum—I think, therefore I am—was the first step in an attempt to figure out what can be reliably known, although he considered not a computer program creating the illusion of his body and his world, but an evil demon. The idea is a close cousin of the philosophers’ thought experiment (or parlor trick) known as “brain-in-a-vat,” which is said to have inspired the Matrix movies. Notice, though, that brain-in-a-vat requires a real brain in a real vat and the Matrix movies had real brains in real people plugged into their simulated world. The proposition that we’re all just computer simulations in a simulated universe eliminates the vat, the brain, the people, and the world. It can also be seen as the nerd’s version of the notion that we’re all simply dreams in the mind of God—perhaps the central creed of a Church of Computer Science.