Chapter 117: The Extended Mind

Where does the mind stop and the world begin? This chapter develops the extended mind thesis within the categorical framework. Clark and Chalmers’ parity principle is reformulated as a carrier extension: the carrier domain Ω_{body} is not fixed at the skull but extends to any substrate that supports the relevant morphism structure. The Extended Mind as Carrier Extension Proposition (VII.P28) shows that relational ontology naturally supports cognitive extension: if mind is morphism structure, then mind is wherever the morphisms flow. Tools, technologies, notebooks, and social structures can be constitutive parts of the cognitive system when they satisfy integration conditions derived from the mind-topos account.