BRAIN - Dreams, déjà vu and delusions caused by faulty 'reality testing'

(Medical Xpress)—New research from the University of Adelaide has delved into the reasons why some people are unable to break free of their delusions, despite overwhelming evidence explaining the delusion isn't real ...

http://medicalxpress.com/news/2014-02-dj-vu-delusions-faulty-reality.h