io9: Weirdest Solutions to the Fermi Paradox
>The Simulation Hypothesis
We haven’t been visited by anyone because we’re living inside a computer simulation — and the simulation isn’t generating any extraterrestrial companions for us.
If true, this could imply one of three things. First, "I mean Gods" — running the simulation have rigged it such that we’re the only civilization in the entire Galaxy (or even the Universe). Or, there really isn’t a true universe out there, it just appears that way to us within our simulated bubble (It’s a ‘If a tree falls in a forest and no one is around to hear it, does it make a sound?’ type thing).
Another more bizarre possibility is that the simulation is being run by a posthuman civilization in search of an answer to the Fermi Paradox, or some other scientific question. Maybe, in an attempt to entertain various hypotheses (perhaps even preemptively in consideration of some proposed action), they’re running a billion different ancestor simulations to determine how many of them produce spacefaring civilizations, or even post-Singularity stage civilizations like themselves.