The Link between Kant’s Critique of Pure Reason and Descartes Discourse on Method


The Link between Kant’s Critique of Pure Reason and Descartes Discourse on Method
According to Rene Descartes reason is mankind’s most universal shared endowment,[1] it is the only thing which makes us men and distinguishes us from animals. [2] Given this, why did Kant have to critique reason? It is must be stated that Kant did not critique reason, but pure reason which leads to dogmatism. For Kant, pure reason alone when detached from sensory experience can provide us with no genuine knowledge whatsoever. Kant couldn’t have critique reason because that would be an extreme of which his philosophy sets out to rectify. Bearing in mind that Kant was instructed in the tradition of Leibnizian rationalism[3], he brings to light in his philosophy that man has the potentiality to attain knowledge. In other words, for Kant, knowledge is possible. This was however the very opposite of the Skeptist who argues that the capacity to know lies beyond the realm of man. More so, Kant was also aware that there was much extremism in philosophy. Hence, Kant’s declared rigorous aim is the scientific foundation and justification of any future metaphysics as “the science of the principles of all knowledge a priori and of all knowledge which follows from these principles.[4]  In view of this, Kant after reading Hume’s empiricism brings in a revolution as Descartes did. Thus, it can be said that Descartes and Kant approaches to traditional philosophy was revolutionary.[5]  Kant met Descartes epistemologically. In fact, while Descartes grasps the principle of subjectivity as rex cogitans-thinking thing, Kant sees it as a self relating subject that attains absolute self consciousness.    By this, it means that Kant and Descartes share something in common in the course of carrying out their revolutionary pursuit.
 This however does not necessarily mean that Kant affirms all that Descartes wrote. What it does mean is that there is a link between both philosophers.  This link is the fact that they both make man’s mind, the “I” with his knowing capacities of which the skeptist doubt the centre of their philosophical world views.[6]  More so, like Descartes; Kant sees mathematics as the model of knowledge, and he uses mathematical judgments as examples of synthetic a prior knowledge. For instance, I can know prior to experience that 5*5=25 is a universal and necessary truth. Like Descartes, Kant refers to his works as critical philosophy not in the negative sense that rejects everything, but on the other hand, he meant a philosophy “to sort or so sift out”[7] every extremes. Thus he’s goal which was to set out the legitimate claims of reason and filter out all groundless or claims that can be put to doubt was very similar to that of Descartes, which is the solidification of epistemic claim that the skeptist that cannot doubt.
Moreover, while Descartes in his Discourse on Method prize reason as the only source of attaining knowledge, and also that which men shared universally. Kant though affirms reason as source of knowledge did not stop there. He was quite aware of the danger of a single story. By a single story, Chimamanda[8] explains that a story though true but is incomplete. Thus, for Kant, Descartes is right in his assertion of reason as source of knowledge, but it is not all by which we know. For Kant, reason alone could not account for the whole story. In view of this, Kant opens his work, Critique of Pure Reason with these words: “there can be no doubt that all our knowledge begins with experience.[9]” With these words, there is no doubt that Kant conceives experience also as source of knowledge. But he was aware that the world of experience alone was the spectre of Humean scepticism.[10] Kant understands that a dichotomy as created by Descartes and Hume between reason and experience will only give a single story and not a complete story. The problem with single story is not that they are untrue, but they are incomplete. Thus, to avoid  this, he add immediately to his already assertion concerning experience in these words, “but though all our knowledge begins with experience, it does not follow that it all arises out of experience,[11]” thus indicating that there was still a need for some of the rationalism of Descartes.  Thus, he achieved what he called Copernican revolution in philosophy by turning the focus of philosophy from metaphysical speculation about the nature of reality to the nature of the subject; the mind. Kant differs from its predecessors such as Descartes and Leibniz by claiming that rationalists’ pure reason can discern the shape, but not the content of reality.[12]



[1] Descartes Discourse on Method and Meditations, Trans. By Laurence J. Lafeur (U.S.A, New Jersey: Prenticse-Hall, Inc., 1952), p.4.
[2] Descartes Discourse on Method and Meditations, Trans. By Laurence J. Lafeur (U.S.A, New Jersey: Prentice-Hall, Inc., 1952), p. 5. 
[3] Lawhead William, The voyage of Discovery: A Historical Introduction to Philosophy, 2nd Ed. (U.S.A:Wadsworth Thomson Learning,  2002), p. 326.
[4] See. Herring Herbart, Cartesian and Kantian Revolution in Philosophy   http://www.unipune.ac.in/snc/cssh/ipq/english/IPQ/21-25%20volumes/23%2001%20&%2002/PDF/23-1&%202-1.pdf  (Accessed November, 23rd 2015)
[5] See. Herring Herbart, Cartesian and Kantian Revolution in Philosophy   http://www.unipune.ac.in/snc/cssh/ipq/english/IPQ/21-25%20volumes/23%2001%20&%2002/PDF/23-1&%202-1.pdf  (Accessed November, 23rd 2015)
[6] See. Herring Herbart, Cartesian and Kantian Revolution in Philosophy   http://www.unipune.ac.in/snc/cssh/ipq/english/IPQ/21-25%20volumes/23%2001%20&%2002/PDF/23-1&%202-1.pdf  (Accessed November, 23rd 2015)
[7] Lawhead William, The voyage of Discovery: A Historical Introduction to Philosophy, 2nd Ed. (U.S.A:Wadsworth Thomson Learning,  2002), p. 327.
[8] See- Chimamanda Ngozi on the Danger of a Single Story, http:/thewirtelife.com/chimamanda-ngozi-adichie/ (Accessed November, 23rd 2015).
[9]Kant Immanuel, Critique of Pure Reason, (New York: Anchor Books, 1966), p. 1.
[10] Lawhead William, p. 326.
[11] Kant Immanuel, Critique of Pure Reason, p. 1.
[12] See-Kant Critique of pure Reason Summary,  http://www.thr-philosophy.com/kant-critique-pure-reason-summary html  (Accessed November, 23rd 2015).

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