The Procedure of doubting ones own beliefs to discover which beliefs is essentially true.
Descartes who engages a basic approach, which aims to defeat doubt at its own ground. He supports doubting the basic route of thinking in addition to doubting the proof of the senses and traditional delusions. If any exact fact can pass this test, it is actually certain and can be measured a solid basis of knowledge.
Doubt is faced in our everyday life through the doubt a person face if god really created the world or in mathematical problems, because we always see men fail which leads us to doubt.
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Descartes deal with the mind-body problem is dual. First, Descartes argues that an answer to this subject assumes a clarification of the union between