Transcendental idealism

Transcendental idealism

Transcendental idealism is a doctrine founded by German philosopher Immanuel Kant in the eighteenth century. Kant's doctrine maintains that human experience of things consists of how they appear to us — implying a fundamentally subject-based component, rather than being an activity that directly (and therefore without any obvious causal link) comprehends the things as they are in and of themselves.


Despite influencing the course of subsequent German philosophy dramatically, exactly how to interpret this concept was a subject of some debate amongst 20th century philosophers. Kant first describes it in his "Critique of Pure Reason", and distinguished his view from contemporary views of realism and idealism, but philosophers do not agree how sharply Kant differs from each of these positions.

Transcendental idealism is occasionally identified with "formalistic idealism" on the basis of passages from Kant's "Prolegomena to any Future Metaphysics", although recent research has tended to dispute this identification. Transcendental idealism was also adopted as a label by Fichte and Schelling and reclaimed in the 20th century in a different manner by Husserl.


Perhaps the best way to approach transcendental idealism is by looking at Kant's account of how we intuit (Ge: anschauen) objects, and that task demands looking at his accounts of space and of time. Before Kant, some thinkers, such as Leibniz, had decided that space and time were not things, but only the relations among things. Other thinkers, including Newton, maintained that space and time were real things or substances. Leibniz had arrived at a radically different understanding of the universe and the things found in it. According to his Monadology, all things that humans ordinarily understand as interactions between individuals and all things that humans ordinarily understand as relations among individuals (such as their relative positions in space and time) have their being in the mind of God but not in the Universe where we perceive them to be. In the view of realists, individual things interact by physical connection and the relations among things are mediated by physical processes that connect them to human brains and give humans a determinate chain of action to them and correct knowledge of them. Kant was aware of problems with both of these positions. He had been influenced by the physics of Newton and understood that there is a physical chain of interactions between things perceived and the one who perceives them. However, an important function of mind is to structure incoming data and to process it in ways that make it other than a simple mapping of outside data. [Martin, "Kant's Metaphysics and Theory of Science", p. 57] Quotation|If we try to keep within the framework of what can be proved by the Kantian argument, we can say that it is possible to demonstrate the empirical reality of space and time, that is to say, the objective validity of all spatial and temporal properties in mathematics and physics. But this empirical reality involves transcendental ideality; space and time are forms of human intuition, and they can only be proved valid for things as they appear to us and not for things as they are in themselves. [Martin, "Kant's Metaphysics and Theory of Science", p. 41]

The salient element here is that space and time, rather than being real "things-in-themselves" or empirically mediated appearances (Ge: Erscheinungen), are the very forms of intuition (Ge: Anschauung) by which we must perceive objects. They are hence neither to be considered properties that we may attribute to objects in perceiving them, nor substantial entities of themselves. They are in that sense subjective, yet necessary, preconditions of any given object insofar as this object is an appearance and not a "thing-in-itself". Humans necessarily perceive objects as located in space and in time. This condition of experience is part of what it means for a human to cognize an object, to perceive and understand it as something both spatial and temporal. Kant argues for these several claims in the section of the "Critique of Pure Reason" entitled the "Transcendental Aesthetic". That section is devoted to the inquiry of the "a priori" conditions of human sensibility, i.e. the faculty by which humans apprehend objects. The following section, the "Transcendental Logic" concerns itself with the manner in which objects are dealt with in thought.

Kant's observations from a logical and philosophical point of view are supported in modern thought by some empirical findings that go beyond the science available to Kant in his time, are not based on what might be called a Kantian ideology, and yet support Kant's conclusions on the grounds of novel discoveries. Kant argues, essentially, that incoming data must be organized into a form that human minds can process. At the dawn of the computer age it was assumed that robots would soon be capable of taking over for humans in many tasks. Unexpectedly, it soon became apparent that pattern recognition was not an easy goal to attain. The human brain seems to be hard wired for pattern recognition. A very telling indication of organic structures for pattern recognition came to light when researchers discovered that the image of a moving object in crossing the retina is processed right in the retina and sends an almost instantaneous message: "Movement!" to the brain. So "movement" turns out to be an automatic processing of raw incoming data into a special signal having immense survival salience to the organism. Kant had to be satisfied with examining the functions of the mind and teasing out the functional dependencies without much if any help being derived from observable physical mechanisms in the brain. The mind imposes structures on incoming data. In the case of the rope perceived to be a snake, the initial structuring must be abandoned. The snake disappears from consciousness and is replaced by a rope. In various ways other philosophies have maintained this useful distinction between what humans conceive to be present and whatever may really be there. Important schools of modern philosophy of science, a field from which Kant drew much, speak in terms of "models" or "convenient fictions" rather than asserting actual knowledge of reality.

Dogmatic idealism

Note that Xenophanes of Colophon in 530 BC came up with something that could be considered an ancestor to Kant's epistemology: "And as for certain truth, no man has seen it, nor will there ever be a man who knows about the gods and about all the things I mention. For if he succeeds to the full in saying what is completely true, he himself is nevertheless unaware of it; and Opinion (seeming) is fixed by fate upon all things." (From Kathleen Freeman's "Ancilla to the Presocratic Philosophers", Xenophanes fragment 34.)

Certain interpretations of some of the medieval Buddhists of India, such as Dharmakirti, may reveal them to be transcendental idealists, since they seemed to hold the position of mereological nihilism but transcendental idealists who held that their minds were distinct from the atoms. Some Buddhists often attempt to maintain that the minds are equal to the atoms of mereological nihilist reality, but Buddhists seem to have no explanation of how this is the case, and much of the literature on the aforementioned Buddhists involves straightforward discussion of atoms and minds as if they are separate. This makes their position very similar to transcendental idealism, resembling Kant's philosophy where there are only things-in-themselves (which are very much like philosophical atoms), and phenomenal properties.


Some of Schopenhauer's comments on the definition of the word "transcendental" are as follows: Quotation|"Transcendental" is the philosophy that makes us aware of the fact that the first and essential laws of this world that are presented to us are rooted in our brain and are therefore known "a priori". It is called "transcendental" because it "goes beyond" the whole given phantasmagoria to the origin thereof. Therefore, as I have said, only the "Critique of Pure Reason" and generally the critical (that is to say, Kantian) philosophy are transcendental. |"Parerga and Paralipomena", Volume I, "Fragments for the History of Philosophy," § 13

Schopenhauer contrasted Kant's transcendental critical philosophy with Leibniz's dogmatic philosophy. Quotation|With Kant the "critical philosophy" appeared as the opponent of this entire method [of dogmatic philosophy] . It makes its problem just those eternal truths (principle of contradiction, principle of sufficient reason) that serve as the foundation of every such dogmatic structure, investigates their origin, and then finds this to be in man's head. Here they spring from the forms properly belonging to it, which it carries in itself for the purpose of perceiving and apprehending the objective world. Thus here in the brain is the quarry furnishing the material for that proud, dogmatic structure. Now because the critical philosophy, in order to reach this result, had to go "beyond" the eternal truths, on which all the previous dogmatism was based, so as to make these truths themselves the subject of investigation, it became "transcendental" philosophy. From this it follows also that the objective world as we know it does not belong to the true being of things-in-themselves, but is its mere "phenomenon", conditioned by those very forms that lie "a priori" in the human intellect (i.e., the brain); hence the world cannot contain anything but phenomena.| "The World as Will and Representation", Vol. I, Appendix: "Criticism of the Kantian Philosophy"

P. F. Strawson

In "The Bounds of Sense", P. F. Strawson suggests a reading of Kant's first "Critique" that once accepted forces rejection of most of the original arguments, including transcendental idealism. Strawson contends that if Kant had followed out the implications of all that he said he would have seen that there were many self-contradictions implicit in the whole.

Strawson views the analytic argument of the "transcendental deduction" as the most valuable idea in the text, and regards transcendental idealism as an unavoidable error in Kant's greatly productive system. In Strawson's traditional reading (also favored in the work of Paul Guyer and Rae Langton), the Kantian term phenomena (literally something that can be seen from the Greek word "phainomenon", "observable") refers to the world of appearances, or the world of "things" sensed. They are tagged as "phenomena" to remind the reader that humans confuse these derivative appearances with whatever may be the forever unavailable "things in themselves" behind our perceptions. The necessary preconditions of experience, the components that humans bring to their apprehending of the world, the forms of perception such as space and time, are what make "a priori" judgments possible, but all of this process of compehending what lies fundamental to human experience fails to bring anyone beyond the inherent limits of human sensibility. Kant's system requires the existence of noumena to prevent a rejection of external reality altogether, and it is this concept (senseless objects of which we can have no real understanding) to which Strawson objects in his book.

Henry Allison

In "Kant's Transcendental Idealism", Henry Allison proposes a reading that opposes Strawson's interpretation. Allison argues that Strawson and others misrepresent Kant by emphasising what has become known as the two-worlds reading (a view developed by Paul Guyer). This —- according to Allison false —- reading of Kant's phenomena/noumena distinction suggests that phenomena and noumena are ontologically distinct from each other. It concludes on that basis that we somehow fall short of knowing the noumena due to the nature of the very means by which we comprehend them. On such a reading, Kant would himself commit the very fallacies he attributes to the transcendental realists. On Allison's reading, Kant's view is better characterized as a two-aspect theory, where noumena and phenomena refer to complementary ways of considering an object. It is the dialectic character of knowing, rather than epistemological insufficiency, that Kant wanted most to assert.


Opposing Kantian transcendental idealism is the doctrine of philosophical realism, that is, the proposition that the world is knowable as it really is, which has been propounded by philosophers such as Henry Babcock Veatch and Ayn Rand.


The nature of knowing had, before Kant, long been considered a direct and straightforward matter. Hume challenged such common sense ideas on the grounds of physics, and Kant responded by accounting for the processes of mind which humans bring to ordering physical inputs into human awareness.

ee also

*"Critique of Pure Reason"
*German idealism
*Immanuel Kant
*"Prolegomena to any Future Metaphysics"
*Schopenhauer's criticism of the Kantian philosophy


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