René Descartes Does Not Reject Sense Perception

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René Descartes Does Not Reject Sense Perception

Some have suggested that René Descartes argues that sense perception relies on the mind rather than on the body. Descartes asserts that we can know our mind more readily than we can know our body. In support of this idea he gives the example of a piece of wax which is observed in its solid form and its liquid form. After pointing out the difficulties of relying on the senses of the physical body to understand the nature of the wax he makes this claim: [P]erception ... is neither a seeing, nor a touching, nor an imagining. ... [R]ather it is an inspection on the part of the mind alone (Section 31). 1 This quote is perhaps the most direct statement of the author's thesis on this subject.

I contend that, based upon the arguments presented in the Second Meditation, Descartes shows that we can use our senses to help us understand the true nature of things, but the senses alone are inadequate to determine truth (since they are often deceived), and that all that may be known with certainty (truth) are those things we know by our judgment, thinking, and understanding of them in our minds. Descartes' argument does not necessarily reject any role of the senses in the process of understanding.

Steps of the Argument:

Descartes began his argument in the First Meditation by questioning or calling into doubt everything that he knew. After examining all the things he thought he knew about himself and the world he concluded (the details of that argument are beyond the scope of this essay) that the only thing he knew with absolute certainty is that I am, I exist (Section 25). Having established the fact that he has a real existence of some kind he then said But I do not yet understand...

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...y some shape, of being enclosed in a place, and of filling up a space in such a way as to exclude any other body from it; ..." [followed by other features not related to extension]. (Section 26)

[5] Perceptio : a related word perceptione in I:11 is translated as knowledge, or perception. In II:5 vel odoratu percipi is translated as [the sense of] smell. In II:7 percipiat is translated perceive or know. In II:11 perceptiones is translated perceptions, notions, or ideas. In II:12 solâ mente percipere is rendered "it is the mind alone which perceives it" (Veitch), "it is my mind alone which perceives it" (Haldane), "I perceive it through the mind alone" (Cress). In II:14 perfectius evidentiusque percipiebam is translated "evident and perfect conception" (Haldane), "clearer and more perfect perception" (Veitch), and "perceived more perfectly and evidently" (Cress).

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