>and if you want to make a simulation of nature, you'd better make it quantum mechanical That is an absurd claim, if taken by itself. Most of nature relevant t

>and if you want to make a simulation of nature, you'd better make it quantum mechanical That is an absurd claim, if taken by itself. Most of nature relevant to us behaves classically. If you want to do simulations of a building or a car or an earthquake or the climate, modeling it as a quantum system would be absurd.