 Two potential challenges to the appeal to demonstrative concepts have been highlighted. The first can be termed the priority argument. It holds that we cannot take demonstrative concepts as explanatorily basic. The demonstrative concepts I possess are a function of my demonstrative capacities and part of what explains my having a given demonstrative capacity is my having certain associated experiences; the experience must be prior to the possession of the demonstrative concept if the former is to explain the latter (Heck 2000). Various formulations of this argument have been developed (see Ayers 2002, Hopp 2009, Roskies 2008, 2010, and Levine 2010). For example, Levine (2010) argues that “[w]hen you see a color and think ‘that color’, the seeing is prior to the demonstrating, or else you really don’t know what you’re demonstrating… But if the seeing, the perceptual experience, is prior to the demonstrating, then the demonstrating can’t be what captures, or brings into existence, the content of that experience” (p. 191). Brewer has provided a response to this kind of objection, following a suggestion rejected by Heck (2000), on the grounds that the form of explanation that we should look for is not a causal explanation, which would indeed require the priority of the experience, but a constitutive one. Thus he says that “On the conceptualist view, experience of a colour sample, R, just is a matter of entertaining a content in which the demonstrative concept ‘thatR shade’ figures as a constituent” (Brewer 2005, p. 221, see also Brewer 2002).