the mind can exist in the absence of the brain and here things seem to change because the answer should be "no". However, since a human body is not the same as the body of a thing in nature, the entire "clear and distinct" ideas might be questioned.
             Descartes however does not leave this weak point unattended. He supports his conception with the argument according to which all that can be conceived in this manner is owed to God. According to him, only the things which can exist beyond any doubt really exist. Since the sense may be deceiving, the only instrument that can be used in order to obtain a proper knowledge of the world is represented by geometry. Geometry can be fals
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