I remember reading this a while ago, but I just read it again because it's a tour de force.
This is why I'm a philosophical materialist. If there is mysterious consciousness-stuff that does
have an observable effect on our physical world, then we can do science experiments on it and learn things about its true nature - it can't permanently evade the realm of science. If there is mysterious consciousness-stuff that doesn't
have an observable effect? Well, that's a "deranged" idea, as Yudkowsky sharply concludes.Zombies! Zombies?
Your “zombie,” in the philosophical usage of the term, is putatively a being that is exactly like you in every respect—identical behavior, identical speech, identical brain; every atom and quark in exactly the same position, moving according to the same causal laws of motion—except that your zombie is not conscious. It is furthermore...