Descartes – in his First Meditation - notes that he sleeps and there are many occasions when he thinks he is awake and “sitting by the fire” although he is lying in his bed asleep and dreaming. As Descartes claims there is no way to be certain that one is asleep or awake. Movies, like Inception and Total Recall make his argument conceivable, although based on my experiences it can be refuted. The state of “being awake” differs from the state of “dreaming” in various ways. To start with the differences first of all, we need to examine the real world and its happenings day by day. What is certain that things in the “waking” world remain regularly the same from day to day. For instance if I go to bed, fall asleep and wake up, the next day I will