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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 ?
This critical reading identifies a whole lineage of fantasists in Shepard's drama and suggests that while for two decades Shepardian characters had shown the instability but also the enormous potential of human imagining, the family plays would explore instead a more harmful side of the delusive power of imagination.
He was the sole nominee facing current President Abdel Fattah Al-Sisi, in a move that made him seem delusive to his supporters.
"I am not determining a point of law," he reminded his fellow parliamentarians, "I am restoring tranquility." To destroy that tranquility and the empire it rested on for a matter of abstract principle was to fall victim to a "species of delusive geometrical accuracy in moral arguments" which was itself "the most fallacious of all sophistry." Such sophistry betrayed the small-mindedness of a pedant.
Within Shepardian poetics, the body of the dead horse has an added dimension, for it wipes out and brings to an end what for decades had constituted an enduring concern and exploration for Shepard: the envisioning of American dreams, an enterprise as delusive as it was full of potential in its heuristic force.
The USA worked on feeding this feeling through the "lake monster" strategy; by creating delusive enemies.
In the present analysis, the syntagm "fantasy (delusive picture, airy vision)" is used with the connotation of "imagination, desire", so that it does not refer, in any way, to ghost or chimera.
Though prophecy is delusive, an agreed point of departure should be falling expectations.
In the wake of serving the poor they only come up with spurious plans and delusive solutions.
She begins quoting George Bernard Shaw's quip about modern marriage as an institution that brings together two people "under the influence of the most violent, most insane, most delusive, and most transient of passions.
Best practice is a delusive concept that we too easily toss about.
/ Or are you a phantom, or a rage?) The delusive mental images, which form the center of attention in this scene, correspond closely with the ancient theory of phantasia.
International Islamic executive vice president Jamal Abdullah al-Jamal said: "We are delighted that the experience of delusive evacuation showed distinct co-operation among the members of the bank's security and safety team and their fellow employees.