 The Mohists’ conception of knowledge and understanding as grounded in the ability to name and sort things correctly leads us back to the questions we raised in response to their theory of language. What determines kind distinctions? What makes it correct to distinguish a particular thing as part of one kind or another? In practice, how do we determine to which kinds things belong? These questions must be answered before we can determine whether we actually have knowledge in particular cases. For the later Mohists’ answers to these questions, we need to look to their account of the notions of “sameness” and “difference” and their theory of argumentation. 