 The main debate regarding the individuation of computational states divides internalists from externalists. According to externalists, computational vehicles are symbols individuated by their wide cognitive contents—paradigmatically, the things that the symbols stand for (Burge 1986, Shapiro 1997, Shagrir 2001). By contrast, most internalists maintain that computational vehicles are symbols individuated by narrow cognitive contents (Segal 1991). Narrow contents are, roughly speaking, semantic contents defined in terms of intrinsic properties of the system. Cognitive contents, in turn, are contents ascribed to a system by a cognitive psychological theory. For instance, the cognitive contents of the visual system are visual contents, whereas the cognitive contents of the auditory system are auditory contents.