JMJ Marist Brothers Notre Dame of Marbel University COLLEGE DEPARTMENT City of Koronadal, South Cotabato RATIONALISM VS. EMPIRICISM OPPOSING VIEWS OF RENE DESCARTES AND DAVID HUME ON THE SOURCE OF KNOWLEDGE A Term Paper For PHPC 101 – Introduction to Philosophy Rev. Fr. Ariel D. Destora 9:00 am – 10:30 am TTh Vince Manuel L. Millona BA-Philosophy (1st Year) vince21millona@gmail.com October 01, 2019 1 JMJ Marist Brothers Notre Dame of Marbel University COLLEGE DEPARTMENT City of Koronadal, South Cotabato INTRODUCTION Several philosophers have contributed their notions on Epistemology, the branch of Philosophy which deals with Knowledge. The Ancient Philosophers had their ideas on the query on the validity, nature, sources, and limits of knowledge. Plato held that man comes to know through remembering (anamnesis) the ideas contemplated by the soul in the world of ideas, while Aristotle held that man comes to know through abstracting the concrete particular thing with the help of man’s knowing faculties. It is clear that even in the ancient times, philosophers have argued on how, where, or why man can know. The terms Empiricism and Rationalism were not in the jargon of the ancient philosophers, and it was the modern philosophers of the 17th and 18th centuries who explicitly used and formulated such terms (Mastin, Empiricism, 2005). In the Modern Period, modern philosophers such as Rene Descartes, Gottfried Wilhelm Leibniz, and Baruch Spinoza were the major rationalist figures of their time. Rationalists believe that the source of knowledge is the intellect and deductive reasoning. In this term paper, the focus for Rationalism will be on the view of Rene Descartes. On the other hand, the modern philosophers who are the primary exponents of empiricism are John Locke, George Berkley, and David Hume. Empiricists hold that the origin of all knowledge is sense experience. In this term paper, the focus for Empiricism will be on the view of David Hume. 2 JMJ Marist Brothers Notre Dame of Marbel University COLLEGE DEPARTMENT City of Koronadal, South Cotabato Rene Descartes, a French mathematician, scientist, and philosopher was regarded as the Father of Modern Philosophy. It is because used a process of methodological skepticism (or doubt) to eliminate doubt and create a solid foundation for genuine knowledge, and not on the basis of authority and the senses (Watson, 2019). He is also famous for his indubitable proposition, “Cogito ergo sum” (was originally in French: Je pense, donc je suis) which means “I think therefore I am”. Descartes, as mentioned, was a Rationalist. He dismissed the senses and perception as unreliable. Reason and deduction were the only reliable method of attaining knowledge (Mastin, 2005). Among his works are: Discourse on the Method (1637), Meditations (1641), Principles of Philosophy (1644), and Passions of the Soul (1646) (Smith, Descartes' Life and Works, 2018). David Hume was a Scottish philosopher, historian, economist, and essayist known for his philosophical empiricism. Philosophy for Hume is the inductive and experimental science of human nature. He took the scientific method of physicist Sir Isaac Newton as his model on forming his epistemology (Jessop & Cranston, 2019). For Hume, the object of the mind is perception, and there are two kinds of perception: Impressions and Ideas. Impressions are perceptions that the mind experiences with the “most force and violence,” and ideas are the “faint images” of impressions (Duignan, Epistemology, 2017). Among his works are: Enquiries concerning Human Understanding and concerning the Principles of Morals (1748, 1751) and A Treatise of Human Nature (1739-1740). 3 JMJ Marist Brothers Notre Dame of Marbel University COLLEGE DEPARTMENT City of Koronadal, South Cotabato DISCUSSION I. RATIONALISM a) Definition According to Blanshard (2016), Rationalism is the view that regards reason as the chief source of knowledge. Moreover, rationalists adopt at least three of the following claims: (I) The Intuition/Deduction Thesis, which holds that some propositions in a particular subject area, S, are knowable by us by intuition alone; still others are knowable by being deduced from intuited propositions; (II) The Innate Knowledge Thesis, which holds that we have knowledge of some truths in a particular subject area, S, as part of our rational nature; and (III) The Innate Concept Thesis, which holds that we have some of the concepts we employ in a particular subject area, S, as part of our rational nature (Markie, 2017). b) Rene Descartes and Rationalism The Rationalism of Rene Descartes can be characterized by the following features: (A) One should believe only what is certain, for anything less than certainty does not guarantee truth, and so does not constitute knowledge; and (B) What the senses tell us falls short of certainty, and therefore we should not trust them; the senses do not yield knowledge; true knowledge, therefore, comes from 4 JMJ Marist Brothers Notre Dame of Marbel University COLLEGE DEPARTMENT City of Koronadal, South Cotabato the understanding alone. With these features and as mentioned in the previous pages, man could only know based on reason alone. Furthermore, Descartes argues the existence of a God, a non-deceiving one who also guarantees the innate ideas in the mind (Wahl, 1991). Moreover, Descartes defines ideas as modes that represent or exhibit objects to the mind. In his work Meditations, he divides ideas into three kinds which are determined by considering the possible origins of the ideational contents presented or exhibited to the mind. These kinds of ideas are Innate, Adventitious, and Factitious. Innate Ideas are ideas whose contents have their origin within man’s nature. Adventitious Ideas are ideas derived from things outside the self. Factitious Ideas are ideas whose contents have their origin in the contents of other ideas (i.e. imagination) (Smith, 2018). c) Methodic Doubt Descartes also devised his own method of investigation. The starting point of this method is to reject all former opinions and create knowledge anew based on solid foundations, as he held that the knowledge we acquire from life experiences and education are unsystematic mixture of truths and falsehoods, and it is sometimes impossible to distinguish the truth from what is not. Thus, he proposed, that first we must remove all our old and chaotic schemes of knowledge, and then follow four specific rules of inquiry that will enable us to build an intelligible system in a methodic manner. The rules are as follows: (I) accept only indubitable, 5 JMJ Marist Brothers Notre Dame of Marbel University COLLEGE DEPARTMENT City of Koronadal, South Cotabato clear, and distinct ideas; (II) in solving problems, Descartes said, “divide up each of the difficulties which I examined into as many parts as possible, and as seemed requisite in order that it might be resolved in the best manner possible”; (III) anent to problem-solving, begin with the simplest objects and work to the harder and more complex ones; and (IV) review to be certain (Fieser, Continental Rationalism, 2017). d) Innate Ideas and God Rene Descartes’ definition of “idea” was somehow ambiguous. It can be distinguished by two ways: (a) First, the term ‘idea’ refers to a brain state (according to his early works) and (b) second, ‘idea’ is understood as a mental phenomenon which has two states. The first state is the idea as act of thought while the second state is the idea as object of thought. Innate ideas, then, can mean a disposition or a capacity to have a particular idea. It was also argued that Descartes must have meant simply that an innate idea is to have a disposition to understand the data. Furthermore, saying that one has innate ideas is to say that one has an inborn (natural) capacity in having an idea (Boyle, 2009). In the Meditations of Rene Descartes (particularly in Meditation VI), he seeks to resolve the problem that led him to doubt in the first place. In doing this, he established first that there could be no ‘evil demon’ who is deceiving him, that he is not dreaming and that he is truly existing in the physical world. To answer these, he claimed that 6 JMJ Marist Brothers Notre Dame of Marbel University COLLEGE DEPARTMENT City of Koronadal, South Cotabato there is a God who is not a deceiver. He used the idea of God to prove that God exists in his ontological arguments. Moreover, he claimed as well that this God is a perfect being, who then cannot deceive man as this deception would mean to God’s imperfection (Hatfield, 2014). II. EMPIRICISM a) Definition According to Duignan, et al. (2016), Empiricism is the view that knowledge and/or concepts originate in experience, and that all rationally acceptable beliefs or propositions are justifiable or knowable only through experience. The term empiricism was derived from the Greek word empeiria which means experience (Duignan, et al. 2016). Additionally, Empiricism denies the view that the mind is equipped with concepts that owe nothing to experience. Empiricists also claim that at birth, the mind is a clean slate (i.e. tabula rasa) and that ideas are provided through experiences (Harvey, 2012). b) David Hume and Empiricism According to David Hume, the content of the mind is perception. There are also two types of perception: Impression and Idea. Impression is the direct, vivid, and forceful product of immediate experience. Idea, on the other hand, is the feeble 7 JMJ Marist Brothers Notre Dame of Marbel University COLLEGE DEPARTMENT City of Koronadal, South Cotabato copy of impression (Kemerling, 2011). Furthermore, Hume divided impression and ideas to: Impressions (a) of sensation and (b) of reflection; and Ideas (a) from memory and (b) from imagination. The impression of sensation is something external while that of reflection is internal. The idea from memory is based from the experience as they transpired. On the other hand, the idea from imagination is from different broken or combined ideas. Moreover, the imagination is guided by the three principles of association: resemblance, contiguity, and cause and effect (Fieser, n.d.). c) Perceptions: Ideas and Impressions In Hume’s Enquiry Concerning Human Understanding, he tried to explain everything that takes place in the mind by appealing to perceptions and their interactions. He distinguished two kinds of perception: impressions and ideas. Hume likens having impressions with “feeling” or first-hand experience. Ergo, impressions include all of the sensations, passions, and emotions that one experiences when engaging in sensory perception. On the other hand, ideas were equated by Hume with thinking: thinking about an object that involves forming an idea which represents the object. The difference between the two is on their degree of forcefulness, liveliness, and vivacity, where Impressions are more forceful, lively, and vivid compared to Ideas which are less forceful, lively, and vivid. Furthermore, Hume determined categories of perception: (I) Simple Ideas, which 8 JMJ Marist Brothers Notre Dame of Marbel University COLLEGE DEPARTMENT City of Koronadal, South Cotabato are exact copies of Simple Impression that one previously had; (II) Simple Impressions, the building blocks of all thought and experience (Noonan, 1999); (III) Complex Ideas, which are caused by Complex Impressions; and (IV) Complex Impressions (Cottrel, n.d.). d) The Copy Principle Hume also proposed a fundamental principle: The Copy Principle. In his Treatise, it was stated that all simple ideas (in their first appearance) are derived from simple impressions which are correspondent to them. All ideas are feeble or weak copies of the more lively impressions (Garret, 1997). Many commentators have argued that this principle is an a priori principle, while others have argued that this principle is not [a priori]. Landy (2012) pointed out that Hume concluded that impressions, which are underived, are the cause (in the proper Humean sense of cause) of ideas. Furthermore, he also explained: Hume’s argument is intended to show that we do not have an idea the representational content of which is a single subject of experience persisting through time. His methodology is to show, first, that we cannot have an impression with the appropriate pictorial content, next, that we cannot, therefore, have an idea with the appropriate pictorial content, and finally, that we cannot, therefore, have an idea with that representational content. Therefore, the copy principle is a thesis that concerns the pictorial content of perception but not their representational content (Landy, 2012). 9 JMJ Marist Brothers Notre Dame of Marbel University COLLEGE DEPARTMENT City of Koronadal, South Cotabato CONCLUSION Different eras have passed and the problem of knowledge still has no solution. Philosophers of each periods have long debated and argued on where we really acquire knowledge. The philosophers that were discussed in this paper were among those who were tackled in our PHPC 101 class and picked the attention of the writer. The rationalists like Descartes and others claim that man can acquire knowledge through reason alone. On the contrary, the empiricists like Hume and others claim that knowledge can be acquired through experiences. From the discussion in the previous pages, the proposition of Descartes rely on his Methodic Doubt. The innate ideas, as proposed by this rationalist, are guaranteed by God. Furthermore, he claims that this God is a perfect being, i.e. who cannot deceive and cannot be deceived. On the other hand, David Hume propounded that the content of the mind are perceptions (which are divided into ideas and impressions which are distinct from one another as the former is just a copy of the latter) and rebuked the innateness of ideas (for he is an empiricist). The distinct positions of Descartes and Hume on Epistemology provide postmodern philosophers and even us, students who are studying Philosophy, a more constructive outlook that could eventually be used in finally solving this problem at hand in the near future. 10 JMJ Marist Brothers Notre Dame of Marbel University COLLEGE DEPARTMENT City of Koronadal, South Cotabato Works Cited Blanshard, B. (2016, July 22). Rationalism. Retrieved September 03, 2019, from Encyclopedia Britannica : https://www.britannica.com/topic/rationalism Boyle, D. A. (2009). Descartes on Innate Ideas. New York: Continuum International Publishing Group. Cottrel, J. (n.d.). David Hume: Imagination. 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