[tavavex]

I think you're tossing around words like "always" or "never" too lightly, with no justification behind them. Why do you think that no matter how much effort is spent, fully understanding the human brain will always be impossible? Always is a really long time. As long as we keep doing research to increasingly precisely model the universe around us, I don't see what would stop this from happening, even if it takes many centuries or millennia. Most people who argue this justify their point by asserting that there is some unprovable quality of the human brain which can't be modeled at all and can only be created in one way - which both lacks substance and seems arbitrary, since I don't think that this relationship provably exists for anything else that we do know about. It seems like a way to justify that humans and only humans are special.