Earlier quoted context omitted.
We cannot test for that which we cannot define. Given that we cannot rigorously define sentience, we cannot test for it. Doesn't really matter whether we're talking about people who are locked in comas, "brain-dead" individuals, dolphins, primates, dogs, or the carefully polished and arranged minerals that we call processors. There are those who believe that were they reduced to life support, they would no longer be…
I'd strongly agree there are no non-contradictory definitions of consciousness among those that commonly appear. But it's a category that, despite these contradiction, hasn't become marginal in the fashion of the aether or the theory of the flat earth. I think this because people indeed need it to bridge the biological world and the world of ethics and legality. I think that if we have a system of legality and system…
Sometimes the replies in these threads leave me wondering if p-zombies are real. It isn't that there are contradictions, it's that we literally do not know how to define the thing. And it has not fallen out of fashion because it is self evidently real - we all experience it.
We don't need it in order to bridge anything. Legality and ethics are largely game theory, however there are some aspects of both that only exist due to it. So it isn't some abstract concept used to bridge other concepts but rather a concrete thing that influences our way of doing things.