Descartes & John Locke Essay

2345 words - 9 pages

The Move from Doubt to Certainty; A Look at the Theories of Descartes and Locke Descartes is interested in the certainty of his existence and the existence of other people and things. Descartes' beliefs vary from those of Socrates. Descartes argues that knowledge is acquired through awareness and experience. Using this approach, Descartes moves through doubt to certainty of his existence. He asks himself various questions about the certainty of his existence and solves them through clear thought and logic. Using this method Descartes establishes doubts to be truths and by the end of the book, he has established that he does indeed exist. In this paper, I will show how Descartes moves through doubt to certainty. I will explain how Descartes uses the cogito, proves the existence of God and what that means to his existence. I will also discuss the general rules of truth that Descartes establishes. In the First Meditation Descartes begins to examine what is certain and what is doubtful. Descartes wants to establish that his knowledge is certain and not doubtful. He states, ...I had accepted many false opinions as being true, and that what I had based on such insecure principles could only be most doubtful and uncertain; so that I had to undertake seriously once in my life to rid myself of all opinions I had adopted up to then, and to begin, and to begin afresh from the foundations, if I wished to establish something firm and constant in the sciences.(Descartes 95) By this Descartes means that he wishes to establish a foundation for his knowledge based on certainty instead of doubt. Descartes first looks at the senses. This is important because the senses are the first thing to cause doubt. He focuses on the perception of things. He says that things far from him, in the distance, give him reason to doubt their certainty, while things that are close to him are indubitable and he is clear about their certainty. However, Descartes realizes that dreams pose an obstacle to his beliefs. Even up close, dreams can be indubitable. Descartes believes that if a person has had a dream that was so intense that the person could not determine it form reality, then they have reason to doubt objects that are close to us and appear to be indubitable. In order to resolve this problem, Descartes suggests that one must examine whether they are dreaming or not. Descartes realizes that he can not rely on his senses anymore to give him dubitable truths. He turns to find something that is indubitable. Descartes tries to use science as a foundation for truth. He discards physics, astronomy, and medicine because all three of them rely upon the senses. "...we shall not be wrong in concluding that physics, astronomy, and medicine, and all the other sciences that depend on the consideration of composite things, are most doubtful and uncertain..."(Descartes 98). However, Descartes finds that such things as geometry and arithmetic can be trusted because their are no senses involved....

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