Well, I was specifically thinking of this passage

The Great Reductionist Project can be seen as figuring out how to express meaningful sentences in terms of a >combination of physical references (statements whose truth-value is determined by a truth-condition directly >correspnding to the real universe we're embedded in) and logical references (valid implications of premises, >or elements of models pinned down by axioms); where both physical references and logical references are to >be described 'effectively' or 'formally', in computable or logical form. (I haven't had time to go into this last part >but it's an already-popular idea in philosophy of computation.)

And the Great Reductionist Thesis can be seen as the proposition that everything meaningful can be >expressed this way eventually.

Which, to my admittedly rusty knowledge of mid 20th century philosophy, sounds extremely similar to the anti-metaphysics position of Carnap circa 1950. His work on Ramsey sentences, if I recall, was an attempt to reduce mixed statements including theoretical concepts ("appleness") to a statement consisting purely of Logical and Observational Terms. I'm fairly sure I saw something very similar to your writings in his late work regarding Modal Logic, but I'm clearly going to have to dig up the specific passage.