Is the real world fair and just? [1]So for some reason it is OK for you to use commonsense to make inferences about things you can’t directly know, but science as a formal method for making such inferences does not enjoy the same privilege? [2]It is defeated by the zombies in which you don’t believe? Curious.
[3]So what does your commonsense tell you about the consciousness of the chair you are sat on? [4]Given the zombie argument that is so legit, how can you know it is either conscious or not conscious[?] It might be just keeping very quiet and still. It might be aware but suffering locked in syndrome.
Your commonsense is this magical power that transcends mere scientific inference. Please clear up these deep riddles of Nature. — apokrisis
I'm not sure if these questions are rhetorical or not. I'll have go anyway, I'm a sucker for a quiz.
1) You introduced commonsense and science, I was just going with your terms. The inference from analogy, which I suggested was done instinctively by most people (or maybe not, maybe people develop theory of mind some other way, it doesn't matter) might be called commonsense, or it might be philosophy. It doesn't matter. The point is that it isn't a theory of consciousness. It's a conjecture of which other things are conscious. Scientific theories of consciousness are typically functionalist ones, such as yours, the IIT, and others. They do make predictions about what other things are conscious based on the structure and function of those things (less so by analogy, although that may be part of it), but those predictions are not checkable except perhaps by reference to our instincts or common sense or philosophical arguments from analogy. It's entirely understandable that when commonsense and functional theories yield the same predictions, they are considered plausible. Neither are testable though, because we don't have a consciousness-o-meter. And the functionalist theories are wrong, and the inference to other minds is not taken far enough.
2) The functionalist theories are defeated by the zombies in which I don't believe, yes, because the functionalist theories seem consistent with there being no experiences present. So they might be valuable in some way, but not as explainers of consciousness.
3) That's an interesting question. My commonsense instinct is that they are not. Of course, what constitutes commonsense I suspect is somewhat culture-relative. I do think they are conscious though, just not in a way that particularly matters to me. I suspect that the content of the consciousness of my chair is so minimal to be of no interest to anything, possibly including the chair.
4) Several reasons. I have rehearsed the argument for panpsychism from the non-vagueness of the concept of consciousness many times on the forum. There may be an argument from psychological causation and non-overdetermination of the physical, but I have yet to develop that. It's important to keep in mind the broad landscape of theoretical possibilities. Out of those panspychism is the least problematic of the three basic possibilities: panpsychism, emergentism and eliminativism. Eliminatism is false by introspection. Emergentism is extremely problematic for a number of reasons already rehearsed. Panpsychism is problematic, but less so.