The brain is either the source of our thoughts as Rodney Brooks and others believe or it is a place where our thoughts are received and from which are thoughts are transmitted in the physical material universe. Some believe the brain is all there is to you and when it dies you are dead. Others believe that the brain is a critical part of you and your incarnation in the physical universe and when it and the rest of your body dies it will one day be raised back to life again but that you and your consciousness and your thinking will continue on after the brain's death but you will have lost your ability to communicate and receive thoughts and diseminate thoughts with the physical universe. Both of these ideas cannot be correct. What do you believe and why?
If you think consciousness and intelligence are the result of the brain, then it is possible to believe that thinking beings that were generated by non-thinking things, could very well create machines that also could think and have consciousness. If you do not think the brain is the source of your thinking and you have a soul that goes on thinking and existing after brain death, then your thoughts about artificial intelligence in terms of the 'evolution' of robosapiens will likely be different.
Here are some links about the brain and what it is and how it works and what it is thought to do:
Thanks to Ron Chrisley and his page for the graphic above:
http://www.cogs.susx.ac.uk/users/ronc/