Descartes'method of doubt,known as the method of Cartesian doubt can be expressed through four rules: "The first of these was to accept nothing as true which I did not clearly recognize to be so;that is to say,carefully to avoid precipitation and prejudice in judgments,and to accept in them nothing more than what was presented to my mind so clearly and distinctly that I could have no occasion to doubt it. "The second was to divide up each of the difficulties which I examined into as many parts as possible,and as seemed requisite in order that it might be resolved in the best manner possible. "The third was to carry on my reflections in due order, commencing with objects that were the most simple and easy to understand,in order to rise little by little,or by degrees,to knowledge of the most complex... "The last was in all cases to make enumerations so complete and reviews so general that I should be certain of having omitted nothing. --From Great BooksDescartes’ method of doubt, known as the method of Cartesian doubt can be expressed through four rules: • "The first of these was to accept nothing as true which I did not clearly recognize to be so; that is to say, carefully to avoid precipitation and prejudice in judgments, and to accept in them nothing more than what was presented to my mind so clearly and distinctly that I could have no occasion to doubt it. • "The second was to divide up each of the difficulties which I examined into as many parts as possible, and as seemed requisite in order that it might be resolved in the best manner possible. • "The third was to carry on my reflections in due order, commencing with objects that were the most simple and easy to understand, in order to rise little by little, or by degrees, to knowledge of the most complex ... • "The last was in all cases to make enumerations so complete and reviews so general that I should be certain of having omitted nothing." -- From Great Books