Nick Bostrom's Simulation Argument suggests that at least one of the following propositions is true: (1) The human species is very likely to go extinct before reaching a 'posthuman' stage; (2) Any posthuman civilization is extremely unlikely to run a significant number of simulations of their evolutionary history; (3) We are almost certainly living in a computer simulation. Critically evaluate the logic behind the third proposition. Discuss potential objections to the statistical assumptions made regarding the number of simulated realities versus base realities, without referencing movies or pop culture depictions of the matrix.