Descartes first meditation included a few arguments that Descartes studied and analyze. The one I choose to analyze was his argument of sense deception. The actually argument is the following: (1) My senses sometimes deceive me. (2) If my senses sometimes deceive me, then they might always deceive me. (3) If my senses might always deceive me, then I cannot be certain about any beliefs acquired through my senses. (4) If I cannot be certain about any beliefs acquired through my senses, then I must suspend judgment on those beliefs. (5) Therefore I must suspend my judgment of those beliefs. To put this is premise conclusion argument form, it would look like this:
- A
- If A then B
- If B then C
- If C then D
- Therefore D
This form is known as multiple modus ponens.
To start off I will I will explain why Descartes accepts each premise. The first premise is that his senses sometimes deceive him. He accepts this because of experiences with distant and small things1, and other things of that sort. By this he means how something far can look small, but in fact is bigger than it lo...
In Meditations, Descartes brings doubt to everything he believes because it is human nature to believe that which is false. He states that most of what he believes comes from the senses and that a lot of times those senses can be deceived. His conclusion of doubting everything is based on his example of a basket of apples. It goes as follows; you have a basket of apples but you fear that some apples have gone bad and you don't want them to rot the others, so you throw all the apples out of the basket. Now that the basket is empty you examine each apple carefully and return the good apples to the basket. This is what he does with his beliefs, he follows and keeps only those beliefs of which he is sure of. Our beliefs as a whole must be discarded and then each individual belief must be looked at carefully before we can accept it. We must only accept those beliefs we feel are good.
Throughout the meditations Descartes refers to clear and distinct ideas. Descartes first introduces doubt to the reader by saying that one cannot trust these clear and distinct ideas. “I have noticed that the senses are sometimes deceptive; as it is a mark of prudence never to place our complete trust in those that have deceived us even once.” (Descartes, 60) He introduces doubt through the senses, dreams, and through the possibility of an evil genius at work. For instance he states that “There is no sure sign that I can tell that I am awake. If there are no sure signs that I can tell that I am awake then there is reason to doubt I am awake. Therefore there is reason to doubt I am awake.” (Descartes 60)This is how Descartes shows that we may be dreaming even though during these dreams we can experience authentic truths. He also he goes on to state that, “If there is reason to doubt that I am awake then there is reason to doubt that I am sitting by the fire. So then there is reason to doubt that I am sitting by a fire even though I see and feel a fire.” (Descartes 60)This Descartes believes could be true because there may be an evil genius at work, whose sole purpose is to put his entire effort...
In the third meditation, Descartes uses the claim “whatever I perceive very clearly and distinctly is true” as a premise to prove the existence of non-deceiving God (Descartes 24). However, later on, Descartes states that the reason why clear and distinct perceptions are true is that God exists and that God is not a deceiver. Specifically speaking, we first have two premises: 1) What I clearly and distinctly perceive is true, and 2) I perceive that God exists and God is not a deceiver clearly and distinctly, and these lead to the conclusion that God exists is true. However, the Cartesian Circle is discovered latter in the book because the premise for premise 1) is actually the same as the conclusion.
Rene Descartes’ greatest work, Meditations on First Philosophy, attempts to build the base of knowledge through a skeptical point of view. In the First Meditation, Descartes argues that his knowledge has been built on reason and his senses, yet how does he know that those concepts are not deceiving him? He begins to doubt that his body exists, and compares himself to an insane person. What if he is delusional about his social ranking, or confused about the color of his clothes, or even unaware of the material that his head is made of? This is all because the senses are deceiving, even in our dreams we experience realistic visions and feelings. Finally, Descartes comes to the conclusion that everything must be doubted, and begins to build his
"Whatever I have up till now accepted as most true I have acquired either from the senses or through the senses. But from time to time I have found that the senses deceive, and it is prudent never to trust completely those who have deceived us even once"(First Meditation, 2). Although the senses help us perceive the world, Descartes believes that the senses are not reliable, and that the mind is a better source of knowledge, and this is due to existence of dreams, evil demons, and the wax argument.
Not only did Descartes set aside all of his previous knowledge, but he also set aside all knowledge he had gained, and that he continued to gain from his five senses. He would not believe what his eyes saw, or what his hand felt, because he could not yet determine his senses as giving him knowledge that could be turned into certainties. He did not have any reason to believe that he could rely on his senses. Descartes doubting of his senses also caused him to reject any knowledge that he had gained through life experience. Most of the knowl...
In the first meditation, Descartes makes a conscious decision to search for “in each of them [his opinions] at least some reason for doubt”(12). Descartes rejects anything and everything that can be doubted and quests for something that is undeniably certain. The foundation of his doubt is that his opinions are largely established by his senses, yet “from time to time I [Descartes] have found that the senses deceive, and it is prudent never to trust completely those who have deceived us even once”(12). First, Descartes establishes that error is possible, employing the example of the straight stick that appears bent when partially submerged in water, as mentioned in the Sixth Replies (64-65). Secondly, he proves that at any given time he could be deceived, such is the case with realistic dreams. Further, Descartes is able to doubt absolutely everything since it cannot be ruled out that “some malicious demon … has employed all his energies in order to deceive me” (15). The malicious demon not only causes Descartes to doubt God, but also sends him “unexpectedly into a deep whirlpool which tumbles me around so that I can neither stand on the bottom or swim on the top”(16). Descartes has reached the point where he must begin to rebuild by searching for certainty.
He quickly releases that this is the foundation of most of his beliefs. He first acknowledges that sometime our senses can deceive us, but say that our senses is mostly sturdy. It is after this that Descartes realizes that there has been times where he has been sleeping and in his dream he was certain that he was awake and sensing real objects. Though his current senses may have be dream senses, he suggests that even dream senses are drawn from our experience of us awake. He then discovers that there are times in which he cannot distinguish whether he is in his waking state and his dream state.
The teaching of Descartes has influenced many minds since his writings. Descartes' belief that clear and distinct perceptions come from the intellect and not the senses was critical to his ultimate goal in Meditations on First Philosophy, for now he has successfully created a foundation of true and certain facts on which to base a sold, scientific belief structure. He has proven himself to exist in some form, to think and therefore feel, and explains how he knows objects or concepts to be real.
In Descartes’ Meditations on First Philosophy he proposes several arguments regarding human perception. He begins this exploration by examining the principles that his beliefs are founded on. By doing this, Descartes is choosing not to question each of his beliefs individually; he is choosing to examine the foundation of his perceptions. Descartes proceeds to question where he has attained his knowledge. The answer, he decides, is from his senses. Descartes also determines that there have been instances where his senses have been deceptive. It is from this idea that Descartes forms his deductions for Meditations I, II, and VI, and begins to question the concept of dualism.
According to Descartes, “because our senses sometimes deceive us, I wanted to suppose that nothing was exactly as they led us to imagine (Descartes 18).” In order to extinguish his uncertainty and find incontrovertible truth, he chooses to “raze everything to the ground and begin again from the original foundations (Descartes 59).” This foundation, which Descartes is certain to be the absolute truth, is “I think, therefore I am (Descartes 18).” Descartes argues that truth and proof of reality lies in the human mind, rather than the senses. In other words, he claims that the existence of material objects are not based on the senses because of human imperfection. In fact, he argues that humans, similarly to Plato’s Allegory of the Cave, are incapable of sensing the true essence or existence of material objects. However, what makes an object real is human thought and the idea of that object, thus paving the way for Descartes’ proof of God’s existence. Because the senses are easily deceived and because Descartes understands that the senses can be deceived, Descartes is aware of his own imperfection. He
In Descartes’ first meditation, paragraphs 9-12, he arrives at the final and most devastating stage of questioning his beliefs. In his first two stages, he questions both small and distant objects and medium sized objects, and concludes that neither can be held as true with any certainty. He throws out the first because of the possibility that the small and distant object is a mirage, and throws out the second because of the possibility that we are actually dreaming while perceiving medium sized objects. In his third and final stage of doubt, Descartes’ examines sma...
Firstly, Descartes made the mistake of supporting a conclusion with premises that can only be true if the conclusion was a premise for the other premises that were supporting it. To clarify, Descartes basically stated that the clarity of his reasoning and perceptions are only possible through the existence of a non-deceiving God and that the non-deceiving God can only be proved through the clear reasoning and perceptions that the non-deceiving God bestowed upon him (51, 52). This is clearly a...
In his Meditations on First Philosophy, Descartes states “I have a clear and distinct idea of myself, in as far as I am only a thinking and unextended thing, and as, on the other hand, I possess a distinct idea of body, in as far as it is only an extended and unthinking thing”. [1] The concept that the mind is an intangible, thinking entity while the body is a tangible entity not capable of thought is known as Cartesian Dualism. The purpose of this essay is to examine how Descartes tries to prove that the mind or soul is, in its essential nature, entirely distinct from the
Descartes is clearing away all knowledge that can be called into doubt. By doing this he hopes to create something real and lasting in the sciences, a foundation to build on. This indisputable fact will become the starting point or origin of all other true knowledge he can build upon it. He starts the first argument by attacking the very beginning of knowledge, human senses. Descartes states, "Surely whatever I had admitte...