Yet, none of the structure or function we've seen has proven to be inherently impossible to simulate. What steenkh is getting at (correct me if I'm wrong), is whether you think the task is impossible or merely impractical, which impacts whether the discussion about it belongs here or in the Philosophy section.
To briefly summarize a series of extended threads we've had, the common position of the "impossible" side is what I like to call magic bean theory. If you have a software replica of a human brain, modeled down the last synapse, does it function as a human brain, is it a person, or will it always lack some je ne sais quoi, some magic bean, that science has not found and may not find but which you are nevertheless certain is absolutely required for conscious experience?