A Commentary to Kant's 'Critique of Pure Reason'

by Norman Kemp Smith

The fact that these fundamental concepts have not yet been quite definitely and precisely formulated in Kant’s own mind, appears very clearly from the immediately following paragraph. For he there again introduces the concept of the transcendental object, and adds that if “we are pleased to name it noumenon for the reason that its representation is not sensuous, we are free so to do.”[1307] The characterisation given in this paragraph of the transcendental object deserves special notice, for in it Kant goes further in the sceptical expression of his position, though not indeed in the modification of it, than in any other passage.

”[The understanding in limiting sensibility] thinks for itself an object in itself, but only as transcendental object which is the cause of appearance and therefore not itself appearance, and which can be thought neither as quantity nor as reality nor as substance, etc.... We are completely ignorant whether it is to be met with in us or outside us, whether it would be at once removed with the cessation of sensibility, or whether in the absence of sensibility it would still remain.”[1308]

This sentence reveals Kant as at once holding unquestioningly to the existence of things in themselves, and yet at the same time as teaching that they must not be conceived in terms of the categories, not even of the categories of reality and existence.

ALTERATIONS IN SECOND EDITION

In the second edition certain paragraphs of the chapter on Phenomena and Noumena are omitted, and new paragraphs are inserted to take their place. Though these alterations do not give adequate expression to the Critical teaching in its maturest form, there are three important respects in which they indicate departures from the teaching of the first edition. In the first place, those paragraphs in which the doctrine of the transcendental object finds expression are entirely eliminated, and the phrase ‘transcendental object’ is no longer employed. This, as we have already noted, is in harmony with the changes similarly made in the second edition Transcendental Deduction and Paralogisms.[1309]

Secondly, Kant is even more emphatic than in the first edition, that the categories must not be employed save in reference to sense intuitions. In the first edition he still allows that their application to things in themselves is logically possible, though without objective validity. In the second edition he goes much further. Save in their empirical employment the categories “mean nothing whatsoever.”[1310]

”[In the absence of sensibility] their whole employment, and indeed all their meaning entirely ceases; for we have then no means of determining whether things in harmony with the categories are even possible....”[1311]

In the third place, Kant, as already noted, distinguishes between a negative and a positive meaning of the term noumenon. Noumenon in its negative sense is defined as being merely that which is not an object of sensuous intuition. By noumenon in the positive sense, on the other hand, is meant an object of non-sensuous intuition. Kant now claims that it is the concept of noumenon in the negative sense, as equivalent therefore simply to the thing in itself, that alone is involved, as a Grenzbegriff, in the “doctrine of sensibility.” For its determination the categories cannot be employed; that would demand a faculty of non-sensuous intuition, which we do not possess, and would amount to the illegitimate assertion of noumena in the positive sense. The limiting concept, indispensably presupposed in human experience, is therefore the bare notion of things in themselves. And accordingly, in modification of the conclusion arrived at in the first edition, viz. that “the division of objects into phenomena and noumena ... is not in any way admissible,”[1312] Kant now adds to the term noumena the qualifying phrase “in the positive sense.” In this way the assumption that things in themselves actually exist becomes quite explicit, despite Kant’s greater insistence upon the impossibility of applying any of the categories to them.

But beyond thus placing in still bolder contrast the two counter assertions, on the one hand that the categories must not be taken by us as other than merely subjective thought-functions, and on the other that a limiting concept is indispensably necessary, Kant makes no attempt in these new passages to meet the difficulties involved. With the assertion that the categories as such, and therefore by implication those of reality and existence, are inapplicable to things in themselves,[1313] he combines, without any apparent consciousness of conflict, the contention that things in themselves must none the less be postulated as actually existing.