Provide a detailed theoretical analysis of Nick Bostrom's Simulation Argument. Specifically, breakdown the three premises of his trilemma: (1) The fraction of human-level civilizations that reach a post-human stage, (2) The fraction of post-human civilizations interested in simulating their ancestors, and (3) The fraction of all observers that live in a simulation. Evaluate the logical consistency of the argument and discuss counter-arguments that suggest at least one of the premises is false.