Starting from the question of the world being created by some intelligent being vs the latest version of the 'multiverse', which encompasses every possible universe (out of 10^500!), and in which the physical rules are basically arbitrary, the article moves on to the thought that if there is one real universe with intelligent being, which develop to a state where they can do large scale simulations - would they do it? Judging from ourselves and the success of 'Sims' etc - certainly! Well, then if there are more simulations than 1 per universe, and the simulations are allowed to evolve until they can simulate themselves again other universes (one level further from 'reality' so to speak), then there is some exponential growth here - meaning that most of all universes will be simulated, so most probably we live in a simulated world. And this means, our universe was done by an intelligent designer after all ...
From John Walker's Review of Susskind, Leonard. The Cosmic Landscape:
Suppose this is the case: we're inside a simulation designed by a freckle-faced superkid for extra credit in her fifth grade science class. Is this something we could discover, or must it, like so many aspects of Theory 2, be forever hidden from our scientific investigation? Surprisingly, this variety of Theory 1 is quite amenable to experiment: neither revelation nor faith is required. What would we expect to see if we inhabited a simulation? Well, there would probably be a discrete time step and granularity in position fixed by the time and position resolution of the simulation—check, and check: the Planck time and distance appear to behave this way in our universe. There would probably be an absolute speed limit to constrain the extent we could directly explore and impose a locality constraint on propagating updates throughout the simulation—check: speed of light. There would be a limit on the extent of the universe we could observe—check: the Hubble radius is an absolute horizon we cannot penetrate, and the last scattering surface of the cosmic background radiation limits electromagnetic observation to a still smaller radius. There would be a limit on the accuracy of physical measurements due to the finite precision of the computation in the simulation—check: Heisenberg uncertainty principle—and, as in games, randomness would be used as a fudge when precision limits were hit—check: quantum mechanics.
In that case, the nearly 'impossible' exact necessary value for the cosmological constant to an accuracy of 120 digits could simply be an effect of a simulation with limited precision ...