A delusion is commonly defined as a fixed false belief and is used in everyday language to describe a belief that is either false, fanciful or derived from deception. In psychiatry, the definition is necessarily more precise and implies that the belief is pathological (the result of an illness or illness process).

Delusions typically occur in the context of neurological or mental illness, although they are not tied to any particular disease and have been found to occur in the context of many pathological states (both physical and mental). However, they are of particular diagnostic importance in psychotic disorders and particularly in schizophrenia.

Psychiatric definition

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Although non-specific concepts of madness have been around for several thousand years, the psychiatrist and philosopher Karl Jaspers was the first to define the three main criteria for a belief to be considered delusional in his book General Psychopathology. These criteria are:

• certainty (held with absolute conviction)
• incorrigibility (not changeable by compelling counterargument or proof to the contrary)
• impossibility or falsity of content (implausible, bizarre or patently untrue)

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"Happy, happy Christmas, that can win us back to the delusions of our childish days; that can recall to the old man the …http://lnk.ms/51DsF
aihanami (aihanami) Thu, 24 Dec 2009 09:11:25 -0000
"Happy, happy Christmas, that can win us back to the delusions of our childish days; that can recall to the old man the …http://lnk.ms/51DsF
Wall Street sociopaths are spending millions on their yachts, with their ill-gotten gains. Delusions of grandeur. Robber barons.
JPatrickHickey (Patrick Hickey) Thu, 24 Dec 2009 09:05:59 -0000
Wall Street sociopaths are spending millions on their yachts, with their ill-gotten gains. Delusions of grandeur. Robber barons.
Delusions of grandeur...
SKSLuckyCharm (Olawumi Ojedapo) Thu, 24 Dec 2009 07:23:09 -0000
Delusions of grandeur...
pmoll - Some of the Signs of schizophrenia - Delusions and …: With men, the symptoms appear early on in the ear.. http://bit.ly/5xWf8h
phjaymes (Jaymes Phoeben) Thu, 24 Dec 2009 07:01:44 -0000
pmoll - Some of the Signs of schizophrenia - Delusions and …: With men, the symptoms appear early on in the ear.. http://bit.ly/5xWf8h
RT @PTP80: @JsoSpeciale i believe you forgot me in your list of celebrities<----lol #sityoASSdown quickly you are suffering from #delusions
JsoSpeciale (Jamillah Mensah) Thu, 24 Dec 2009 07:00:46 -0000
RT @PTP80: @JsoSpeciale i believe you forgot me in your list of celebrities<----lol #sityoASSdown quickly you are suffering from #delusions
It seems very likely that harry reid flunked history, & seems to have several severe mental delusions & disorders. - http://bit.ly/56Ag5u
iamomegaman (Omegaman) Thu, 24 Dec 2009 06:20:08 -0000
It seems very likely that harry reid flunked history, & seems to have several severe mental delusions & disorders. - http://bit.ly/56Ag5u

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