Abstract
The distinction we make between five different senses is a universal one.<sup>1</sup> Rather than speaking of generically perceiving something, we talk of perceiving in one of five determinate ways: we see, hear, touch, smell, and taste things. In distinguishing determinate ways of perceiving things what are we distinguishing between? What, in other words, is a sense modality?<sup>2</sup> An answer to this question must tell us what constitutes a sense modality and so needs to do more than simply describe differences in virtue of which we can distinguish the perceptions of different senses. There are many such differences