Monday, May 19, 2003

The Edge. Martin Rees. "All these multiverse ideas lead to a remarkable synthesis between cosmology and physics...But they also lead to the extraordinary consequence that we may not be the deepest reality, we may be a simulation." [John Robb's Radio Weblog] Mostly convincing, but I didn't understand the argument toward the end, because: Plank volume and finite entropy of the contents of any event horizon arguments suggest that the cardinality of a single universe could not be greater than that of a Turing machine computation. Then standard diagonalization arguments would come into play to preclude some of the simulations he mentions. 10:53:52 PM