“Okay, Mister President. I’m going to ask you to imagine superior beings whose intelligence is to ours what ours is to an earthworm’s…Our descendants, perhaps. Let’s also imagine they have computers so powerful that they can re-create a virtual world in which they can bring back to life very precise replicas of their ‘ancestors’ and watch how they evolve in different scenarios. With a computer the size of a very small moon, the history of the human race from the birth of Homo sapiens could be simulated a billion times. This is the digital simulation hypothesis…”
