The question is ultimately meaningless. All we have are actions and reactions, and brain scans. We can talk perfectly well based on that, although, it will be a bit cumbersome.
All the qualia, subjective stuff etc. is just shorthand, for whta ultimately boils down to actions in the world.
That already presupposes a very narrow idea of what's meaningful that is quite far away from everyday life, where we talk about and evaluate subjective experiences all the time.
How do we talk about ethics in terms of actions, reactions abd brain scans please? That looks like an uncovered check.
In what sense are they a shorthand for actions in the world?
All the qualia, subjective stuff etc. is just shorthand, for whta ultimately boils down to actions in the world.