Déjà vu, (/?de???? ?vu?/) from French, literally “already seen”, is the phenomenon of having the strong sensation that an event or experience currently being experienced has been experienced in the past, whether it has actually happened or not. The psychologist Edward B. Titchener in his book A Textbook of Psychology (1928), explained déjà vu as caused by a person having a brief glimpse of an object or situation, before the brain has completed “constructing” a full conscious perception of the experience. Such a “partial perception” then results in a false sense of familiarity. [1] Scientific approaches reject the explanation of déjà vu as “precognition” or “prophecy”, but rather explain it as an anomaly of memory, which creates a distinct impression that an experience is “being recalled”. [2][3] This explanation is supported by the fact that the sense of “recollection” at the time is strong in most cases, but that the circumstances of the “previous” experience (when, where, and how the earlier experience occurred) are uncertain or believed to be impossible.