Given 1 and 2, it's possible that there is no such thing as "reality"—every simulation is just hosted within another simulation, in a directed cyclic graph (e.g. there is a simulation that eventually hosts one of the simulations above it—or, at least, a simulation quark-for-quark identical to it.)
And if you accept that, you're only a little way from proposing a basis to the existence of this graph: http://en.wikipedia.org/wiki/Mathematical_universe_hypothesi... — that a simulation that "runs" another is really just "connecting" to the mathematical structure of the other simulation, and so you can actually be simultaneously hosted by 1, 2, N, or even zero parent realities, and still you'd exist.
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Given 1 and 2, it's possible that there is no such thing as "reality"—every simulation is just hosted within another simulation, in a directed cyclic graph (e.g. there is a simulation that eventually hosts one of the simulations above it—or, at least, a simulation quark-for-quark identical to it.)
And if you accept that, you're only a little way from proposing a basis to the existence of this graph: http://en.wikipedia.org/wiki/Mathematical_universe_hypothesi... — that a simulation that "runs" another is really just "connecting" to the mathematical structure of the other simulation, and so you can actually be simultaneously hosted by 1, 2, N, or even zero parent realities, and still you'd exist.