deas. The first one is adventitiousideas; those ideas that come from outside experiences. Thesecond is invented ideas; those that are derived from theimagination such as sirens and chimera. The final is innateideas; those that are within one when they are born. Descartes uses two more points to further establish that Godexists. He uses the ideas of infinite and perfect. Thesetwo ideas, Descartes cannot account for. The only way forsuch things to come about would be from an infinite andperfect being such as God. These ideas have a directrelationship with God. In order for a finite beings such asDescartes to have a concept of infinite it must have beenplanted there by an infinite being such as God. Descartesconcludes this idea to be true because one cannot derive theidea of infinite by negating the finite(Descartes 125). Anexample of this would be the use of a number line. Thenumber line will never be able to illustrate infinity. Onecould negate every number on a number line and still notarrive at infinity. Therefore, Descartes concludes that God does exist andtherefore is not an evil deceiver. Because God has suppliedus with the innate ideas of perfection and infinity, God,therefore, must be infinite and perfect. Descartes statesthat, Whence it is clear enough that he cannot be adeceiver, for the natural light teaches us that deceit stemsnecessarily from some defect(Descartes 131). Since God isperfect he is not an evil deceiver.It is important to realize that by the time Descarteshas reached his Fourth Meditation he has proved threeimportant things. The first is that doubt is not universal. The second is that there is a general rule of truth. Thethird is that God exists and cannot be an evil deceiver. However, Descartes raises a question: If God exists andcannot be an evil deceiver then why are humans imperfect andperpetually making errors? Descartes explains this throughthe explanation of free will.Descartes states ...
