In the Transcendental Aesthetic, Kant famously makes the following startling claim, which we can call the transcendental ideality thesis concerning the nature of space, or, for ease of reference in what follows, simply “TI”: Der Raum stellt gar keine Eigenschaft irgend einiger Dinge an sich, oder sie in ihrem Verhältniß auf einander vor, d.i. keine Bestimmung derselben, die an Gegenständen selbst haftete, und welche bliebe, wenn man auch von allen subjectiven Bedingungen der Anschauung abstrahirte.

Kant once wrote, “Many historians of philosophy... let the philosophers speak mere nonsense.... They cannot see beyond what the philosophers actually said to what they really meant to say.’ Rae Langton begins her book with this quotation. She concludes it, after a final pithy summary of the position that she attributes to Kant, with the comment, “That, it seems to me, is what Kant said, and meant to say”. In between are some two hundred pages of admirably clear, tightly argued (...) exegesis, supplemented by detailed references, in which she offers what the dust jacket blurb fairly describes as “a new interpretation and defence of Kant’s doctrine of things in themselves.” This is an extremely engaging and thought-provoking book. I am pleased to recommend it. (shrink)

In the transcendental aesthetic of the Critique of Pure Reason, Kant claims that space and time are neither things in themselves nor properties of things in themselves but mere subjective forms of our sensible experience. Call this the Subjectivity Thesis. The striking conclusion follows an analysis of the representations of space and time. Kant argues that the two representations function as a priori conditions of experience, and are singular "intuitions" rather than general concepts. He also contends that the representations underwrite (...) some non-trivial a priori cognition of the objects of sensible experience. The Subjectivity Thesis is then presented as an immediate consequence: Space represents no property at all of any things in themselves nor any relation of them to each other. . . . For neither absolute nor relative determinations can be intuited prior to the existence of the things to which they pertain, thus [neither] can be intuited a priori. Time is not something which exists of itself, or which inheres in things as an objective determination. . . . [Were it] a determination or order inhering in things themselves, it could not precede the objects as their condition, and be known and intuited a priori by means of synthetic propositions. Kant's argument for the Subjectivity Thesis seems to have the following structure: * No absolute or relational features of things in themselves can be cognized a priori. (shrink)

Wonderfully clear, scholarly, and well argued, Kant’s Intuitionism offers a bold new interpretation of the thesis of the Transcendental Aesthetic. Falkenstein reads Kant as a “formal intuitionist.” That is, he takes Kant to have maintained that the forms of intuition, space, and time were given along with sensations. They were neither preexisting representations, nor intellectual or imaginative constructions out of sensations. In this context “given” contrasts with “constructed”; subjects’ representations of space and time derived from their sensory constitutions. When subjects’ (...) senses were stimulated, that produced sensations with intensities varying according to the stimulus; because of the subjects’ constitutions, the intensity values were ordered after one another in time and adjacent to one another in space. Falkenstein characterizes space and time as “presentational orders” of sensations. (shrink)

This chapter contains sections titled: Central Issues in the Historical Dispute Resolving Issues over Kant's Position Kant's Arguments for his Claims.

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