AB,
I do not see a definition of consciousness which is incomplete.
I just see no definition of consciousness in your scenario.
Then you haven’t been paying attention. Consciousness is a significant field of research in cognitive science, notably psychology, neuropsychology and neuroscience. As Wiki puts it: “
The primary focus is on understanding what it means biologically and psychologically for information to be present in consciousness—that is, on determining the neural and psychological correlates of consciousness”.
Even if that wasn’t true though and there were no definitions at all, that would still give you two big problems:
First, a “don’t know” would not give you licence to insert any explanation that happens to take your fancy. All it would give you is a “don’t know” – if you wanted to postulate “soul” etc then you’d have all your work ahead of you to investigate and validate the claim.
Second, the question you were actually asked concerned why you would reject a term for which we have partial “definitions” – ie, naturalistic consciousness – for terms for which you have no definitions of any kind – ie, “soul”, “spiritual” etc. Why in other words not apply your own critique to the terms you happen to favour?
My definition of consciousness is an awareness of information, but no amount of complex juggling of information flows and neural network activity can generate awareness of information - it just moves information from one place to another. As I have indicated previously, awareness can only be achieved by having a recipient of information - it is not the information itself.
That’s just a faith claim that contradicts the evidence we do have. Just asserting “no amount of” etc is epistemically worthless. How could you possibly know for example what machines of similar complexity to brains could one day achieve?