alt Hacker Newsqualia may not exist as such. they could just be essentially 'names' for states of neurons that we mix and match (like chords on a keyboard. arguing over the 'redness' of a percept is like arguing about the C-sharpness of a chord. we can talk about some frequencies but that's it.) we would have no way of knowing otherwise since we only perceive the output of our neural processes, and don't get to participate in the construction of these outputs, nor sense them happening. We just 'know' they are happening when we achieve those neural states and we identify those states relative to the others.
The point of qualia is that we seem to agree that these certain neuronal states "feel" like something. That being alive and conscious is an experience. Yes, it's exceedingly likely that all of the necessary components for "feeling" something is encoded right in the neuronal state. But we still need a framework for asking questions such as, "Does your red look the same as my red?" and "Why do I experience sensation, sometimes physical in nature, when I am depressed?"
It is absolutely an ill-defined concept, but it's another blunt tool in our toolbox that we use to better explore the world. Sometimes, our observations lead to better tools, and "artificial" intelligence is a fantastic sandbox for exploring these ideas. I'm glad that this discussion is taking place.