The sensation of deja vu happens when a person has a familiar feeling in some situation that is actually unfamiliar in its essence. It is as if you have already experienced something that is a novel, like a person, a new place or event. Even if you have no recollection about to bring it back and finally understand why you had this awkward feeling of familiarity. Although this kind of cognitive experience appears challenging, at first sight, I believe that chapter 7 offers a good material to make a reasonable hypothesis about this subject. Firstly, it is critical to acknowledge that our memory is subdivided into two different types that have their different ramifications each. The primary types are explicit and implicit memory. While the explicit memory is that one which is accessed to make conscious and intentional recalls, like remember a password, the implicit memory is that one which we have without awareness, because it is unconscious. ...