Imagine an atom-for-atom duplicate of yourself that laughs at your jokes, flinches when poked, and says ouch, but has no inner experience whatsoever. That is the philosophical zombie, one of the most debated tools in modern philosophy of mind, and this episode explains why it matters for the hard problem of consciousness. We define phenomenal consciousness using Thomas Nagel's what it is like formulation, distinguish it from access consciousness, and trace the concept from Keith Campbell's imitation man in 1970 and Robert Kirk's coinage in 1974 to David Chalmers' 1996 modal argument against physicalism.

The conversation works through the logic of conceivability and metaphysical possibility, then tours the variants: behavioral and neurological zombies, the philosophical Vulcan, and the inverse zombie that resembles locked-in syndrome. We con ...