Simulation theory is a speculative hypothesis that suggests our reality could be a computer simulation created by a more advanced civilization. However, it is important to note that simulation theory is currently a philosophical and theoretical concept rather than a proven scientific theory.
The nature of the "real" universe, if it exists, and its relationship to the simulated universe, as proposed by simulation theory, is purely speculative. Different interpretations and variations of simulation theory exist, and they offer various possibilities.
In some versions of simulation theory, the simulated universe is considered to be contained within the physical universe that we currently observe. In this view, there may not be a distinct "real" universe separate from the simulated reality. Instead, the simulation is running within the same physical framework as our perceived reality.
Other interpretations of simulation theory propose the existence of a higher-level reality or a "real" universe outside of our perceived reality. In this case, the simulated universe would be akin to a program running within the larger framework of the "real" universe, possibly controlled or overseen by some form of operators or creators.
It's important to emphasize that simulation theory, as intriguing as it may be, currently lacks empirical evidence to support or refute its claims. The concept remains speculative and falls more into the realm of philosophy and metaphysics rather than established scientific theory.