Permutation City is only required reading to understand Dust Theory. I'm arguing that the odds of us being simulated (if the reference class includes the whole multiverse) is extremely high. I also believe in the information theory of identity; this means that part of our consciousness is really being implemented in the physical world. This, following the lines of argument, gives hypothetical future FAIs a motive to simulate us.

I didn't realize how hard this was to follow if you aren't already familiar with these concepts. Sorry!