 These important questions aside, it is clear that the Mohists had a primary interest in determining the conditions under which two or more objects may be regarded as the same (tong) or different (yi). Correlatively, they looked for conditions in which an object is admissibly characterized as of a certain kind. This prompted the Mohists to recognize names of different types, three in particular: unrestricted (da), classifying (lei), and private (si). In A78 the Mohists assert that “naming something ‘horse’ is classifying it”, and that “for ‘what is like the object’ we necessarily use this name”, indicating that the name ‘horse’ applies to a class of objects that are in some sense relevantly similar. By contrast, “naming someone ‘Zang’” (or, say, the proper name ‘Jack’) “is ‘private’”, a “name which stays confined to this object”. Names that are “private” refer to single individuals and no others. These two kinds of names are distinguished from the universal ‘thing’, of which the Mohists assert, “any object necessarily (bi) requires this name”.