 The Mohists specify three sorts of general criteria for naming things, as we mentioned briefly in the section on  language. (There may originally have been further criteria, as only a series of fragments remain of the text or texts that treated these issues.) Some general names refer to objects that share the same “shape and looks” (xíng mào 形貌, visible form and observable features). Examples include mountains, hills, houses, shrines, swords, humans, and parts of the body (NO1–2, 7). Such names are likely regarded as denoting kinds, since their use is based on features regarded as intrinsically similar. Other general names distinguish things on the basis of “residence and migration” (jū yùn 居運). These include anything named after a place, such as a Qin horse, or anything located in a place. Instead of picking out things that count as kinds in the sense of sharing some intrinsic similarity, this criterion seems to identify things that are “the same” by virtue of being “united” in some way, such as by being in the same location. A third set of criteria are “amount and number” (liàng shù 量數) (NO2). Perhaps an example of a kind based on such criteria might be “quadruped.”