In Chapter 5, I set out the notion of correctness as a condition for understanding. If one understands, one understands correctly. This feature allows a distinction between understanding and misunderstanding. In this chapter, I set out a second feature for understanding, namely that the concept of understanding is applicable to self and the other. In Chapter 2, I pointed out that “understanding” was a word in a public language such as English and, being public, is shared between self and the other.