The simulation theory is the hypothesis that reality could be simulated—for example by quantum computer simulation—to a degree indistinguishable from "true" reality. It could contain conscious minds that may or may not know that they live inside a simulation. This is quite different from the current, technologically achievable concept of virtual reality, which is easily distinguished from the experience of actuality. Simulated reality, by contrast, would be hard or impossible to separate from "true" reality. There has been much debate over this topic, ranging from philosophical discourse to practical applications in computing. Arguments Simulation argument A version of the simulation hypothesis was first theorized as a part of a philosophical argument on the part of René Descartes, and later by Hans Moravec. The philosopher Nick Bostrom developed an expanded argument examining the probability of our reality being a simulation. His argument states that at least one of the following statements is very likely to be true: Human civilization or a comparable civilization is unlikely to reach a level of technological maturity capable of producing simulated realities or such simulations are physically impossible to construct. A comparable civilization reaching aforementioned technological status will likely not produce a significant number of simulated realities (one that might push the probable existence of digital entities beyond the probable number of "real" entities in a Universe) for any of a number of reasons, such as diversion of computational processing power for other tasks, ethical considerations of holding entities captive in simulated realities, etc. Any entities with our general set of experiences are almost certainly living in a simulation. We are living in a reality in which post-humans have not developed yet and we are actually living in reality. We will have no way of knowing that we live in a simulation because we will never reach the technological capacity to realize the marks of a simulated reality. Bostrom's argument rests on the premises that given sufficiently advanced technology, it is possible to represent the populated surface of the Earth without recourse to digital physics; that the qualia experienced by a simulated consciousness are comparable or equivalent to those of a naturally occurring human consciousness, and that one or more levels of simulation within simulations would be feasible given only a modest expenditure of computational resources in the real world. First, if one assumes that humans will not be destroyed nor destroy themselves before developing such