People seem to perceive and locate pains in bodily locations, but also seem to conceive of pains as mental states that can be introspected. However, pains cannot be both bodily and mental, at least according to most conceptions of these two categories: mental states are not the kind of entities that inhabit body parts. How are we to resolve this paradox of pain (Aydede in Pain: new papers on its nature and the methodology of its study. MIT Press, Cambridge, 2006a; Hill in Pain: new papers on its nature and the methodology of its study. MIT Press, Cambridge, 2006)? In this paper, I put forward what I call the ‘Developmental Challenge’, tackling the second pillar of this paradox, i.e. the introspectionist (or mental-state) view of pain accord...