If we are able to explain why you believe in, and talk about qualia without referring to qualia whatsoever in our explanation, then we should reject the existence of qualia as a hypothesis
That argument has an inverse: “If we are able to explain why you believe in, and talk about an external without referring to an external world whatsoever in our explanation, then we should reject the existence of an external world as a hypothesis”.
People want reductive explanation to be unidirectional,so that you have an A and a B, and clearly it is the B which is redundant and can be replaced with A. But not all explanations work in that convenient way...sometimes A and B are mutually redundant, in the sense that you don’t need both.
The moral of the story being to look for the overall best explanation, not just eliminate redundancy.
That argument has an inverse: “If we are able to explain why you believe in, and talk about an external without referring to an external world whatsoever in our explanation, then we should reject the existence of an external world as a hypothesis”.
People want reductive explanation to be unidirectional,so that you have an A and a B, and clearly it is the B which is redundant and can be replaced with A. But not all explanations work in that convenient way...sometimes A and B are mutually redundant, in the sense that you don’t need both.
The moral of the story being to look for the overall best explanation, not just eliminate redundancy.