I recently discovered Black Mirror.

It's a great and fascinating series. Finally something other then the mind numbing pabulum that is most TV.

I especially loved season 1 / episode 2.

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The way our brain works, all experience, self consciousness and awareness is intricately linked to physical perception. If we were to go the 'brain in a petri dish' route, we would have to fake all those signals a body would send to the brain. If we just start emulating the brain physiology digitally, that is easier of course.

But I would not call the result of either method a 'human being', but something inherently different.