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Certainty in Descartes' Meditations on First Philosophy Essay

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Certainty in Descartes' Meditations on First Philosophy

René Descartes was the first philosopher to raise the question of how we can claim to know anything about the world with certainty. The idea is not that these doubts are probable, but that their possibility can never be entirely ruled out. If we can never be certain, how can we claim to know anything?

The First Meditation of Meditations on First Philosophy, subtitled "What can be called into doubt," opens with the Meditator reflecting on the number of falsehoods he has believed during his life and on the subsequent ability of the body to deceive him. Seated alone by the fire, he resolves to demolish former opinions and rebuild his knowledge on more certain grounds.

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However, the Meditator realizes that he is often convinced when he is dreaming that he is sensing real objects. He feels certain that he is awake and sitting by the fire, but reflects that often he has dreamed this very sort of thing and been thoroughly convinced by it. On further reflection, he realizes that even simple things can be doubted. Omnipotent God could make even our conception of mathematics false. One might argue that God is supremely good and would not lead Descartes to believe falsely all these things. He supposes that not God, but some "evil demon" has committed itself to deceiving him so that everything he thinks he knows is false. By doubting everything, he can at least be sure not to be misled into falsehood by this demon.

Recalling his previous thoughts in Meditation Two, the Meditator supposes that what he sees does not exist, that his memory is faulty, that he has no senses and no body, and that extension, movement and place are mistaken notions. Perhaps, he remarks, the only certain thing remaining is that there is no certainty. Although this argument often seems logical and fully-developed, Descartes uses this meditation to as inspiration prove that perhaps there is one thing that is absolutely certain in the universe: his existence.

The Meditator has conceded that he has no senses and no body, but can he not exist either? He has also noted that the physical world does not exist, which might also seem to imply his non-existence. Yet to

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