The problem of self- evidency of existence has been propounded in a content contrary, or at least unconcerned, to the theory of the reality of existence. But some scholars such as Riizl or Tusl have claimed self-evidency of existent. Existent here has been interpreted as existentiality. If we accept the reality of existence and notice that this reality could not be found in the mind, we can conclude that we can only understand the implications of the existent not its reality. Its reality can be understood only in the Knowledge by presence. Knowledge by presence is not divided to concepts and propositions. So the meaning of self- evidency of existence is the self- evidency of existence's implications.