[Filligree]

> A concrete example: if we knew we lived in a simulation, and therefore knew that the simulation of an entire universe were possible, we'd probably expend resources on research and engineering efforts to create such a simulation.

It is pretty unlikely that an equal simulation would be possible, and we already know it's possible to create smaller ones; particle-physics simulations are common, though still incomplete.

In general, there's no requirement that the 'metaverse' follow the same laws of physics as this one.