 The common strategy in the most successful treatments of perceptual experiences and bodily sensations (Shoemaker 1984a, Clark 1993; adumbrated in Sellars 1956) is to individuate experiences of various general types (color experiences, experiences of sounds, feelings of temperature) in part by appeal to their positions in the “quality spaces” associated with the relevant sense modalities — that is, the (perhaps multidimensional) matrices determined by judgments about the relative similarities and differences among the experiences in question. So, for example, the experience of a very reddish-orange could be (partially) characterized as the state produced by the viewing of a color swatch within some particular range, which tends to produce the judgment or belief that the state just experienced is more similar to the experience of red than of orange. (Analogous characterizations, of course, will have to be given of these other color experiences.) The judgments or beliefs in question will themselves be (partially) characterized in terms of their tendencies to produce sorting or categorization behavior of certain specified kinds.