What if the lively colors of a sunset, the buzz of traffic, even the beating of your own heart, are only lines of code that flicker over a cosmic computer screen? It seems to us that we have a body – skin, blood, bones – how could this be someone’s artificial code? But consider this: what we really consider is formed by our senses and spirit. What really is for us can, after all, just be a complicated design, a pattern that unfolds within a larger system. This is not a new sci-fi thriller-it is a question because philosophers stared at the stars for the first time. Popular because of the …