We have no other term than perception to express the process which is employed in scientific observation and experiment. But it is plain that so soon as the judgment that refers to “This” is modified through the inevitable demand for qualification by exact ideas--“_This_ hurts me,” “_What_ hurts you?” “This old sprain, at the pace we are walking”--a conflict of elements has arisen within the judgment. And as commonplace perception passes into scientific observation, the qualifying ideas, on which truth and relevancy depend, dwarf the importance of the “this,” and ultimately oust it altogether. That is a simple case in which the ideal of knowledge and the nature of reality operate within the judgment to split asunder its primitive form. The subject as expressed by a pure demonstrative refuses to {64} take account either of truth, _i.e._ consistency with knowledge as a whole, or of relevancy, _i.e._ consistency with the relation involved in the particular predication that may be in question. Our commonplace perception halts between these two extremes. It deals with the world of individual objects and persons, which, being already systematised according to our current observations and interests, has, so long as we keep to its order, a sufficient degree of truth and relevancy for the needs of daily life. Thus if I say, “This book will do as a desk to write upon,” the truth of the qualification “book” (_i.e._ the reality of the subject) is assumed on the ground of the facility of recognising a well-known “thing,” while the relevancy of the qualification “book” is not questioned, because we accept an individual thing as an object of habitual interest _qua_ individual, and do not demand that whenever it is named those properties alone should be indicated which are relevant to the purpose for which it is named. The “thing” is a current coin of popular thought, and makes common perception workable without straining after a special relevancy in the subject of every predication. Such special relevancy leads ultimately to the ideal of _definition_, in which subject and predicate are adequate to each other and necessarily connected. A definitory judgment drops the demonstrative and relies on qualifying ideas alone. It is therefore an abstract universal Judgment, while the Judgment of Perception, so long as it retains the demonstrative, is a Singular Judgment. _Proper names in Judgment_ _c_. But a very curious example of a divergence or half-way house in Knowledge is that form of the singular Judgment in which the subject is a proper name. A proper name is {65} designative and not definitory. It may be described as a generalised demonstrative pronoun--a demonstrative pronoun which has the same particular reference in the mouth of every one who uses, it, and beyond the given present of time.