Like most people who enjoy dark rooms and Sleep’s Jerusalem, I dig the simulation argument. It is, as far as I can tell, the most reasonable scientific proposition no one completely believes. I have yet to encounter anyone who totally buys it; even the man most responsible for its proliferation places the likelihood of its validity at roughly 20 percent. But even a one-in-five chance presents the potential for a paradigm shift greater than every other historical shift combined. It would place the Copernican Revolution on a par with the invention of Velcro. The man to whom I refer is
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