An interesting recent discussion at MeFi. The last few days have been good, there. My favorite comment from the thread, courtesy of vacapinta :

Each of us is an ever-changing chorus of voices, a small tribe of motivations, trying to advance their own desires. Nominally, one of those voices is in control but sometimes overthrows can occur as when we lapse into a cult or fall in love. A schizophrenic is not someone with “extra” voices”, it is someone whose voices have lapsed into anarchy.
I also dont believe that this “self” can be so easily transcribed into a simulation. It is not mere pattern (e.g. neurons+connections) but is deeply embedded into its physiological container. Our minds have deep roots in the soil of this reality with its electromagnetic fields and quantum quirkiness. Any computer that can truly create consciousness and not some cheap simulation will have to be as algorithmically complex as the universe itself. This is not bound to happen anytime soon, if ever. When I die, I die. Death is the absence of change.
Thoughts That, If Not Deep, Are At Least Wide