Jaime Balmes lottery, or to achieve write something coherent by moving the pen randomly on the paper. For Balmes, these are the three pillars of metaphysics. To better define this, there is an analysis of the " cogito ergo sum " Cartesian, according to which the affirmation of the "I think, therefore I exist" Cartesian is in principle a truth of conscience, later transformed into an intellectual truth of evidence, a logical syllogism whose reality is understood through intuition. Having founded the " cogito " on something intellectual, Descartes falls into the risk of reducing the " cogito " to something logical
Descartes number only one currently known. If is an odd almost perfect number, that is, and is taken as a 'spoof' prime, then is a Descartes number, since . If were prime, would be an odd perfect number. Descartes number In number theory, a Descartes number is an odd number which would have been an odd perfect number, if one of its composite factors were prime. They are named after René Descartes who observed that the number would be an odd perfect number if only were a prime number, since the sum-of-divisors function for would satisfy, if 22021 were prime, where we