I find the concept of functionality very interesting in this book, specifically in the case of Deep Blue. If you build something that has the same functionality as something else, what exactly does that mean? It is obviouslly still different, especially if the implementation of that functionality is different. I think this really points to how intelligence arises. Where did our intelligence arise? If we had the technology to replicate evolution using tiny nan-robots instead of cells, would a being eventually evolve that would have our kind of intelligence? Or maybe it can be said that Deep Blue and humans are both equally intelligent(in terms of chess), except each entities intelligence is implemented differently, Deep Blue's being a computer program, and ours being "cellular" intelligence that arises through evolution. I think that Ghost in the Shell is a very good example of this. If you replaced your brain with a machine, but you still retained all your memories and emotions, would you still be yourself, even though the implementation of "you" is now different?