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DELUSION, med. jurisp. A diseased state of the mind, in which persons believe things to exist, which exist only, or in the degree they are conceived of only in their own imaginations, with a persuasion so fixed and firm, that neither evidence nor argument can convince them to the contrary.
     2. The individual is, of course, insane. For example, should a parent unjustly persist without the least ground in attributing to his daughter a course of vice, and use her with uniform unkindness, there not being the slightest pretence or color of reason for the supposition, a just inference of insanity, or delusion, would arise in the minds of a jury: because a supposition long entertained and persisted in, after argument to the contrary, and against the natural affections of a parent, suggests that he must labor under some morbid mental delusion. 3 Addams' R. 90, 91; Id. 180; Hagg. R. 27 and see Dr. Connolly's Inquiry into Insanity, 384; Ray, Med. Jur. Prel. Views., Sec. 20, p. 41, and Sec. 22, p. 47; 3 Addams, R. 79; 1 Litt. R. 371 Annales d'Hygiene Publique, tom. 3, p. 370; 8 Watts, 70; 13 Ves. 89; 1 Pow. Dev. by Jarman, 130, note Shelf. on Lun. 296; 2 Bouv. Inst. n. 2104-10.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in periodicals archive ?
But Mr Summers said: "If Britain thinks American financial regulators, who have difficulty coming together on anything, are going to come together to give greater permissions and less regulation to UK firms, I would call that belief close to delusional."
They identified 22 female and 13 male county residents with a firm diagnosis of delusional infestation, also known as delusional parasitosis.
A population-based study among individuals living in Olmsted County, Minnesota from 1976 to 2010 found that the incidence of delusional infestation was 1.9 cases (95% confidence interval, 1.5 to 2.4) per 100,000 person-years.
'Lorenzana himself is delusional in believing that uniting with other anti-Duterte forces makes the CPP 'bankrupt,'' the CPP said.
Halstead is definitely back to his usual self and is not breaking a sweat in dealing with a delusional as shown in the promo clip.
A literature search was carried out using the electronic databases Medline/PubMed, SciELO, Cochrane Library and six specialised handbooks, since 1950 up to 2018, in order to perform a comprehensive literature review about the delusional phenomenon in AN.
Literature review indicates that shared delusional disorder most often occurs among married couples, siblings, and mother and child.
Delusional disorder remains a rare diagnosis, with the persecutory subtype being the most common and the erotomanic subtype being much rarer.
Part I--Thematic Psychopathology of Delusional Psychoses--attempts to define delusional themes by relating them to the specific of the self, thus positing the idea that thematic psychotic transformation as a consequence of delusional ideation contents places the subject within a deviant narrative scenario unfolding a world parallel with daily life (...) where the limits or identity and autonomy fade.
His thinking showed delusional perception, sudden delusional idea, delusion of persecution and reference.
With reference to Tales from the Coffeeshop by Patroclos in the Sunday Mail on March 6, we are so not used to the truth that when one speaks it he must be delusional. This is the most striking comment I received after issuing a public statement that I will not run in the forthcoming elections.
Dubai: A saleswoman, who fancied that her colleague had promised to marry her after they had sex three times, has been acquitted of having sex out of wedlock because she suffers from a delusional disorder.