_Judgment._--We have already spoken of that specific process by which, having formed a given conception, or a given rule, we bring the individual objects of perception and thought under that rule, or reject them from it, according as they agree or disagree with the conception we have formed. The process itself we have called classification. The mental activity thus employed is technically termed _judgment_--the power of subsuming, under a given notion or conception, the particular objects which properly belong there. Thus, the botanist, as he meets with new plants, and the ornithologist, as he discovers new varieties of birds, refers them at once to the family, the genus, the species to which they belong. His mind runs over the generic types of the several classes and orders into which all plants and birds are divided, he perceives that his new specimen answers to the characteristic features of one of these families, or classes, and not to those of the others, and he accordingly assigns it a place under one, and excludes it from the rest. So doing, he exercises judgment. All classification involves and depends upon this power; closely viewed, the action of the mind, in the exercise of this power, amounts simply to this, the perception of agreement or disagreement between two objects of thought. In the case supposed, the genus or species, as described by those who have treated of the particular science, is one of the objects contemplated; the next specimen of plant or bird, as carefully observed and studied, is the other. These two objects of thought are compared; the one is perceived to agree or not to agree with the other; and on the ground of this agreement or disagreement, the classification is made. This perception of agreement in such a case is an act of judgment, so called.