Could our entire universe have been created by a superintelligent species, just like computer scientists write software to simulate chemical reactions or the weather? It may sound silly, but with the exponential increase in computing power, it could be conceivable? And if for humans, why not for others? If our universe were a simulation, how could we tell?

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David Chalmers is an Australian philosopher specializing in the area of philosophy of mind and philosophy of language. He is Professor of Philosophy and codirector of the Center for Mind, Brain, and Consciousness at New York University.

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