Consciousness is a potential technology; we are exquisite machines, nothing less than sentient patterns. As such, there's no convincing technical reason we can't eventually upload ourselves into matrices of our design and choosing. It's likely the phenomenon we casually call "intelligence" will cease to be strictly biological as we begin to merge with our machines more meaningfully and intimately. (Philip K. Dick once wrote that "living and nonliving things are exchanging properties." I suspect that in a few hundred years, barring disaster, separating the animate from the inanimate will probably be an exercise in futility.) Ultimately, we have two options: self-mutate by venturing off-planet in minds and bodies of our own design, or succumb to extinction.
Metzinger has teamed up with Blanke and his colleagues in an experiment that induces an out-of-body experience in healthy volunteers. They film each volunteer from behind and project the image into a head-mounted display worn by the volunteer so that they see an image of themselves standing about 2 metres in front. The experimenters then stroke the volunteer's back - which the volunteers see being done to their virtual self. This creates sensory conflict, and many reported feeling their sense of self migrating out of their physical bodies and towards the virtual one (Science, vol 317, p 1096). To Metzinger, these experiments demonstrate that self-consciousness begins with the feeling of owning a body, but there is more to self-consciousness than the mere feelings of embodiment. "Selfhood has many components," says Metzinger. "We are trying to fill them in, building block by building block. This is just the beginning."
Anil Ananthaswamy is a contributing editor for New Scientist
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