Might I recommend reading some more philosophy of science? Particularly Kuhn (Structures of Scientific Revolutions), Feyerabend, and responses to them.

I appreciate that. I'm student of philosophy, and I've spent some years with that material, though it's not my area of speciality or anything. But to be clear, I'm not trying to apply or endorse a principle like egan's law or 'preserve the phenomena'. I'm just trying to figure out what 'adding up to normality' is supposed to mean. My impression so far is that it unless it's a statement of the iterative nature of theoretical activity, then it involves a commitment to a foundationalist theory of empiricism.