Imagine a you with no one inside

Chalmers asks you to conceive of a being physically and behaviorally identical to a human, down to yelping 'ouch,' but with zero inner experience: no qualia, nobody home. If such a zombie is even conceivable, he argues, consciousness cannot be fully explained by physical processes alone.

— David Chalmers, The Conscious Mind: In Search of a Fundamental Theory — Oxford University Press, 1996, Ch. 3
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