Earlier quoted context omitted.
Assuming there's no trivial way of mapping our neural networks to hardware chips running binary code, writing the emulator might prove beyond the human mind. Can our thought processes be abstracted into blocks of a few hundred thousand lines of high level language we might actually be capable of writing?
Perhaps you don't need to. Perhaps you only need to emulate the substrate (neural network, blabla) and then copy an instance of a running brain to it. That may be a lot simpler than understanding the actual processes.
http://www.philosophy.ox.ac.uk/__data/assets/pdf_file/0019/3...