Has This Happened Before? Déjà vu is French for “already seen”. It describes an oddly familiar experience that you know shouldn’t be that familiar to you. Déjà vu is common amongst most people and only lasts a very short amount of time, minutes or even seconds. There are 4 different categories that the common form of déjà vu can fall into: memory, dual-processing, attentional and neurological. Memory is, for example, you are performing a task and you focused on that task, but