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The theory behind deja vu is that it is a phenomenon where a person feels as though they have experienced a current situation before, even though they know they haven't. It is believed to be caused by a delay in the brain's processing and storage of information, making a new experience feel familiar.
Yes, most people will experience deja vu at some point in their lives. Studies have shown that around 60-70% of people have had at least one experience of deja vu.
While there are various theories about the cause of deja vu, there is no definitive scientific explanation. Some researchers believe it is a memory-based phenomenon, while others suggest it could be related to a disruption in brain functioning or emotional stress.
Deja vu is not considered a sign of a neurological disorder on its own. However, if someone experiences frequent or intense episodes of deja vu, it could be a symptom of an underlying condition such as epilepsy or migraine.
Some research suggests that certain factors, such as stress, fatigue, or sleep deprivation, can increase the likelihood of experiencing deja vu. It can also be triggered by seeing or experiencing something that is similar to a previous memory or dream, leading to a feeling of familiarity.