Monday, July 6, 2009

Does Consciousness Exist?

A sophisticated and powerful theory of consciousness, the multiple drafts model, has been proposed (Dennett & Kinsbourne, 1992). Dennett believed that while psychologists and philosophers no longer believe in the soul, they nevertheless remain unwittingly in the grip Descartes picture of consciousness. Descartes said that the soul was the single place where all the manifold features of human experience came together in a single, private, privileged stream of consciousness.

Dennett concludes, information processes in different parts of the brain produce varying drafts of experience, often at the same time, and interacting in diverse ways.

You have probably gone to bed occasionally with a pain, gone to sleep, and then later been awakened by the pain. Was there pain when you were asleep, or did the pain only exist while you were awake and conscious of it?

The former alternative seems more plausible. If the pain literally ceased to exist when you were asleep-were not conscious of it- it could not have caused you to wake up (Searle, 1990). In Dennett’s terminology, the pain continued to exist as a draft of consciousness. An increase in the pain caused it to be “written down” waking you up.

Leahey, T. H; Harris R.J (2001) Learning and Cognition

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