"A philosophical zombie or p-zombie is a hypothetical entity that looks and behaves exactly like a human (often stipulated to be atom-by-atom identical to a human) but is not actually conscious. A p-zombie is as likely as anyone else to ask, "When I see red, do I see the same color that you see when you see red?" but they have no real experience of the color red; the zombie's speech can be explained purely in mechanistic terms. The zombie thought experiment is purported to show that consciousness cannot be reduced to merely physical things: our universe is purported to perhaps have special "bridging laws" which evoke a mind into existence when there are atoms in a suitable brain-like configuration."