Tim Button (UCL) Artefacts of representational choices

When we formulate theories, we make decisions about what to count as theoretically primitive and what to count as theoretically derivative. For example: when we are doing arithmetic, we might treat "+" as a primitive and we might define "<" in terms of "+".  Metaphysicians might want to ask whether our decision---about what to treat as theoretically primitive (or derivative)---kept track of what is metaphysically primitive (or derivative). I doubt the question makes sense. To explain why, I'll offer some general considerations, a particular case study (about space), and a logical argument that you can't hope to avoid some artefacts of representational choices.