Delusion . Types can include jealous, grandeur, erotomanic, somatic, paranoid/persecution, religious, referential, control, nihilistic, .
False Fixed Belief. A delusion is a false fixed belief. In other words, when some one believes in something that despite contrary evidence they will not alter their thoughts or ideas. Examples: someone is putting poison in my drinking water, my mail is being read before i get it, the neighbors are aliens, my dog talks to me, I am jesus, my dead grandmother visits me every day. There are many causes of delusions.