With nothing more than just the knowledge that he is a thinking thing, Descartes goes on to further meditate on more monumental topics. Not only does this realization of his existence serve as the foundation for all other knowledge, it served as the starting point of a new era of modern western philosophy. Although the idea of existence of a thinking thing is a stepping stone to further proceed in his argument, Descartes leaves room for no further doubt and systematically explains his reasoning.
To further probe at what Descartes means by his certain true, one must know how he came to this conclusion. He is firm in his resolve to continue his search for certainty and to discard as false anything that is open to the slightest doubt.
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