Well, there are two catches involved: we don't have that kind of model for a human brain, but it would be required to setup proper initial conditions for a work

Well, there are two catches involved: we don't have that kind of model for a human brain, but it would be required to setup proper initial conditions for a working brain. Second, depending on the simulation method required (classical vs. QM), the resulting model could easily end up being so ridiculously huge that we couldn't build a computer capable of running it based on current tech for lack of natural resources.