>impossible

I agree with you. Even the deductive logic that is used to describe biological phenomena can't be described in biological terms to begin with. So why should consciousness?

Denying that Qualia exists would also mean, that there is no practical reasoning in checking if a programmed machine is doing something because of its programming or because it makes a conscious decision.

To me the claim that idealism is a fallacy in itself sounds like a reductionist view of the human experience and an outdated epistemological error that leads to a cartesian determinism of what it means and feels like to be a human and have a consciousness. Its reducing the whole question down to a primitive utilitarian sense of: If we can't do good predictions of it, therefore we categorically shouldn't bother.