The KK thesis that Descartes uses is to show how these arguments work. The KK thesis follows: if a knows that p, then a knows that a knows that p. basically this means that if I know that there is snow outside then I know that I know that there is snow outside. The problem with this argument is that if we are not sure about our senses then there is no way that we can be sure about the knowledge that we possess. In making this thesis work one must have a strong understanding of what “knowing” really means. But there is no way that one can actually have this understanding. One must have self-knowledge or basically one must really know himself/herself. Therefore if you do not have that notion of self then you do not possess any knowledge.As we can see the KK thesis works in favour with what Descartes is saying in all of his arguments. The only problem is that he does not believe that his argument about God is that strong. He feels that if there is an Omnipotent God then there is no way that he could ever deceive us.There is no way that he could be all knowing and make us doubt the things that we do. On the other hand there is no way that there could be no God because our senses had to be created by someone. Therefore there must have been an evil demon that has deceived us. But since he doubts everything then he is not mislead into the false believing of a demon. So, in a later meditation he proves that there is a God and that he is not a deceiver.