If we examine each of these forms of judgment we discover that in every
one is involved some peculiar idea which is its essential
characteristic. Thus, a singular judgment, in which the subject of
discourse is a single object, involves obviously the special idea of
oneness, or unity. A particular judgment, relating to several objects,
implies the idea of plurality, and discriminates between the several
objects. Now, the whole list of these ideas will constitute the complete
classification of the fundamental conceptions of the understanding,
regarded as the faculty which judges, and these may be called
categories.