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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 ?
The official narrative has now undergone a further drastic delusionary change.
This has been the official position of the "Washington consensus" on foreign policy for five years now, and Hillary Clinton is a paid-up member of that delusionary group.
If Deila thinks he's an experienced campaigner, having managed Celtic to victory over Rangers in the League Cup last season, then he too is delusionary.
The perceived invulnerability of the healthy athlete was just a delusionary product of a ballplayer's notoriety.
There are certainly circumstances more favorabl than others but waiting for the green light from others is delusionary.
The Know-Nothings took their exclusionary, not to say delusionary, notions into the electoral area and founded the American Party.
First, the Indian security establishment finds itself in a quandary, mainly because of delusionary thinking.
"Delusionary Thinking, Whether White or Black or In Between: Fictions of Race in Philip Roth's The Human Stain?
Anti-Semitism, for example, "has very little to do with the actual behavior of Jews or the strictures of their highly ethical religion," but is instead based on "delusionary perceptions that are accepted as authoritative and passed on and embellished from generation to generation" (Perry and Schweitzer 2002, 3).
Our experiences may be so perceptually limited and limiting--not only individually but together--that we find them to be both distracting and delusionary. This could significantly decrease the likelihood of mutual understanding, as well as the sharing of a commonly sensed "reality."
If you are mad, it is normal to be illusionary or delusionary like the cyborg woman.
I suppose it exposes my chronic eupepsia or delusionary optimism but the looking backward occasioned by this first--and probably last--collection of mine has been the source of thankfulness rather than rueful moping.