www.methodejournal.org Categorical Structures and the Multiple Realisability Argument

property counterpart theory Perhaps the most compelling argument against the possibility of fundamental categorical struc-tures is the Multiple Realisability Argument (MRA). According to it, the proper account of the de re modal representation of categorical structures implies the multiple realisability of their causal/nomic roles, a fact that prima facie has unpleasant epistemic and modal conse-quences. In this paper, I examine some recently proposed responses to MRA and find them wanting. I then suggest an alternative response and argue for its adequacy. The suggested response is based on two assumptions: first, that the actual fundamental structures are world-bound tropes and, second, that the appropriate account of their de re modal representation is a properly articulated version of property-counterpart theory