A simulation is level 1, a simulation of a simulation is level 2, etc.
obtaining enough information to create such a simulation and pay the energy cost to run it, and finish the computation before the simulated person dies is hard
For once, computational complexity isn’t the main problem. The main problem is that to mechanise Newcomb, you still need to make assumptions about time and causality...so a mechanisation of Newcomb is not going to tell you anything new about time and causality, only echo the assumptions it’s based on.
But time and causality are worth explaining because we have evidence of them.
A simulation is level 1, a simulation of a simulation is level 2, etc.
For once, computational complexity isn’t the main problem. The main problem is that to mechanise Newcomb, you still need to make assumptions about time and causality...so a mechanisation of Newcomb is not going to tell you anything new about time and causality, only echo the assumptions it’s based on.
But time and causality are worth explaining because we have evidence of them.