Comparing Descartes and Peirce's Opinions On Knowledge Essay

The cogito, “I think” is Descartes’ first certainty and his first step into knowledge. Descartes argues that there is one thing that he is most certain of and even the evil demon can manipulate and make him doubt. He cannot doubt that he thinks because even doubting of a form of thinking and that means that he will be thinking. Even if the demon made him doubt that he is thinking, he would be confident that he is thinking that the demon is making him doubt his thinking. He cannot also doubt that he exists and if he were to doubt of his existence, he would prove that he exists because of his thoughts, and thus his thinking means he exists and hence if he exists then he must be thinking of his existence. Therefore, Descartes extends his certainty

     Knowledge is gained only through experience, and experiences only exist in the mind as individual units of thought. This theory of knowledge belonged to David Hume, a Scottish philosopher. Hume was born on April 26, 1711, as his family’s second son. His father died when he was an infant and left his mother to care for him, his older brother, and his sister. David Hume passed through ordinary classes with great success, and found an early love for literature. He lived on his family’s estate, Ninewells, near Edinburgh. Throughout his life, literature consumed his thoughts, and his life is little more than his works. By the age of 40, David Hume had been employed twice and had failed at the family careers,

Montaigne and Descartes both made use of a philosophical method that focused on the use of doubt to make discoveries about themselves and the world around them. However, they doubted different things. Descartes doubted all his previous knowledge from his senses, while Montaigne doubted that there were any absolute certainties in knowledge. Although they both began their philosophical processes by doubting, Montaigne doubting a constant static self, and Descartes doubted that anything existed at all, Descartes was able to move past that doubt to find one indubitably certainty, "I think, therefore I am".

Rene Descartes decision to shatter the molds of traditional thinking is still talked about today. He is regarded as an influential abstract thinker; and some of his main ideas are still talked about by philosophers all over the world. While he wrote the "Meditations", he secluded himself from the outside world for a length of time, basically tore up his conventional thinking; and tried to come to some conclusion as to what was actually true and existing. In order to show that the sciences rest on firm foundations and that these foundations lay in the mind and not the senses, Descartes must begin by bringing into doubt all the beliefs that come to him by the senses. This is done in the first of six

Through questioning the knowledge he had always believed to be true, Descartes comes to realize that many of his basic beliefs were founded on sensual knowledge. This leads him to question his very existence, and eventually to search for unconditional proof of his existence

In the meditations, Descartes evaluates whether or not everything we know is a reality or a dream. Descartes claims that we can only be sure that our beliefs are true when we clearly and distinctively perceive them to be true. As the reader analyzes the third meditation, Descartes has confirmed that some of his beliefs are in fact true. The first is that Descartes himself exists. This is expressed in what has now become a popular quote known as the “Cogito” which says, “I think therefore I am. His second conclusion is that God exist and that he is not a deceiver. Descartes then presents his arguments to prove the existence of God. He argues that by nature humans are imperfect beings. Furthermore, humankind could not possibly be able to comprehend perfection or infinite things on their own. He writes, “By the name of God I understand a substance that is infinite, independent, all-knowing, all powerful, and which myself and everything else…have been created.”(16) Descartes uses this description of God to display the distinction between God and man.

For in Descartes terms, it was plausible to doubt that one has a body, but impossible to doubt the existence of one’s mind; therefore “…self and mind must be identical” (Palmer 162).

Rene Descartes, a rationalist, said that each person contains the criteria for truth and knowledge in them. Finding truth and knowledge comes from the individual themselves, not necessarily from God. Descartes also believed that reason is the same for every single person. Descartes believed that nothing could be true unless we as humans could perceive it. He also believed that you could break down things into smaller simpler parts. Descartes also believed that there was a relationship between the mind and body. He also believed that the idea of being perfect originated from God since God himself was perfect. He also integrates his mathematical concepts into his methodology. Descartes also applied doubt to his ideas before he

Descartes answers his seemingly hopeless skepticism from the first meditation with the Cogito. The basic point of his Cogito argument is that for me to either perceive awry, or even to doubt my own existence, I must exist. It is, as Descartes says, “’I am, I exist’ is necessarily true every time it is uttered by me or conceived in my mind (Med2, par3).” He makes two arguments for the Cogito in his second meditation. Descartes arrives at the Cogito through the notion of an omnipotent deceiver actually. He starts to question his own

Descartes as a rationalist believes that knowledge comes from the mind alone. During the First Meditation, Descartes came to the conclusion that there must be some kind of evil deceiver that "leads him to a state of doubt" (Descartes 77). Descartes starts out with the fact that distant sensations are subject to doubt and uncertainty. He then goes on to try and cast doubt onto close sensations. Descartes starts off by stating that close sense perception must be certain because we are not crazy, and only a insane person would doubt what was right in front of them. Descartes then uses the dream argument to cast uncertainty on close sense perception because "they are as lively, vivid and clear as reality is when we are awake" (Descartes 76). Descartes then states that geometry and math are certain. "For whether I am awake or sleeping, two and three added together always make five, and a square never has more than four sides; and it does not seem possible that truths so apparent can be suspected of any falsity or uncertainty" (Descartes 98). Descartes comes to realize this certainty because math, geometry, and the simple sciences can be understood and proved through logic and reasoning. He then uses his Deceiver Argument to cast doubt on close sensations. He questions how we know for certain that God is good, and how we know that

He finds it plausible that we are all living in a dream and we have never experienced reality. He can no longer give any credence to his senses and finds himself in a place of complete uncertainty. Descartes comes to the conclusion that nothing can be perceived more easily and more evidently than his own mind. He has discovered that even bodies are not accurately perceived by the senses or the faculty of imagination, and are only accurately being perceived by the intellect. He also realizes that they are not distinguished through being touched, smelled, or tasted, but by being understood alone. (An apple is an apple because our mind tells us that it is an apple.) It is the faculty of reason that gives the knowledge and lets the mind know the truths and essences of objects. Descartes assumes that all of us can be decided by our senses, someone can see something far away, and then discover that is not what we thought it was. Or even a oar when is immerse half in water attempt to be bent, but instead is straight. Descartes think that we cannot always be sure of what we sense, and gives the example of himself seated by the fire.

Descartes' meditations are created in pursuit of certainty, or true knowledge. He cannot assume that what he has learned is necessarily true, because he is unsure of the accuracy of its initial source. In order to purge himself of all information that is possibly wrong, he subjects his knowledge to methodic doubt. This results in a (theoretical) doubt of everything he knows. Anything, he reasons, that can sustain such serious doubt must be unquestionable truth, and knowledge can then be built from that base. Eventually, Descartes doubts everything. But by doubting, he must exist, hence his "Cogito ergo sum".

How do we know what we know? Ideas reside in the minds of intelligent beings, but a clear perception of where these ideas come from is often the point of debate. It is with this in mind that René Descartes set forth on the daunting task to determine where clear and distinct ideas come from. A particular passage written in Meditations on First Philosophy known as the wax passage shall be examined. Descartes' thought process shall be followed, and the central point of his argument discussed.

With the emergence of the scientific revolution in the 17th century, views of society and nature were transformed throughout Europe. There were great developments in mathematics, physics, astronomy, biology, and chemistry. The world and its views were changing, and with that change, came a new change in thought, a new change in philosophy. Apart from ancient Greek philosophy, which was centered on finding order in a vast variety of things by searching for a fundamental amalgamating principle, Descartes sought to establish order via some fundamental division. Descartes understands and expresses that what we know about our mind is more definite than what we know about the world outside our mind. Descartes’

During Meditations 2, Descartes establishes a version of his famous ‘cogito ergo sum’. He establishes that despite the fact that we may not know the world around us as well as we think we do, we can know the mind better and the trusting the mind can lead him to the seemingly justified conclusion that he exists.