Is someone under twilight anesthesia or in a deep k-hole approaching the state of being a p-zombie? I would think so. Maybe I misunderstand the definition of p-zombie?
A p-zombie is something that looks and acts indistinguishably from a person, but doesn’t have an internal consciousness, ie. it provides sensory data, remembers past events, and exhibits behaviour, but it doesn’t “feel” or “experience” anything. A heavily sedated person who’s barely conscious is just a regular ol’ zombie.
I would consider people that are blackout drunk to be p-zombies given this definition. The part of the blackout person other people interact with, their self, simply isn't there - but they are still animated (mostly) like other people with selves. If you are truly blackout drunk I don't think you experience the moment in a traditional sense (a moment from the perspective of a self). There might be an experience there, but it's radically different from what is normally considered subjective experience. The person can have consciousness clinically (as in they show external signs of consciousness) - but their self is not there and their subjective sense is in discontinuity.