qualia 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.