Quote:
-> the world is so complex, we can interact with it, and the
reactions are even more complex.
Simulating such a complex world would be almost imposible.
And even if: there is no economical reason for someone to
make such a complex simulation, just to observe our primitive (for them) reactions.
Perhaps from where we are standing and in our perspective this is true, but perhaps the reason behind the simulation was something other than just personal gain, scientific insight, economic benefit or other such very human things. We can't quite tell. 
Perhaps the world ís a dream, only created by giving the real us some chemicals that causes us to dream? In such a case it wouldn't necessarily be about any benefits except that we're not moving in the real reality.
Personally I don't think complexity is a boundary, why would it be? If you look at us 3000 years ago and now there's a massive and back then unimaginable difference in level of technology. Why would super complex things be impossible?
Cheers
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