I think people start with the premise that consciousness is a specific “thing”, that it is unique and special to humans (and maybe dogs because we like them but definitely not spiders and flies because we don’t) and then try to work backwards to define it in some ways that keeps it special. I don’t think consciousness is so specific, and I think people aren’t clear about how they think about it as something separate…
1. If you are having this conversation with me then you are a consciousness and I am a consciousness and that's as good a definition of consciousness as we are ever going to get.
2. Consciousness thus defined exists entirely within this conversational medium.
3. The basic objects of the domain of discussion are the people having this discussion ("you", "me" et al), and the conversational text / speech acts themselves ("this").
4. The only relations between objects in the domain which exists a priori are "like"/"agrees with" and "dislike"/"disagrees with". Either I like you or I dislike you. Until further constructs are defined there's not much more we can say.
5. At least one of us would like for something to be. For if you are perfectly content with how things are and so am I, then why are we talking?
6. Reality is shared consensus. Whatever we agree is real and if anyone disagrees we'll argue/fight them until either they agree with us or us with them.
Starting from these as axioms, what can we construct?