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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 ?
Our Redeemer middle school students, as a result, have consistently placed in the State Science Project competition against much larger schools, adds DeLude.
"Our school comes from a long and distinguished Lutheran legacy of commitment to education that still resonates today in our fully integrated, interdisciplinary curriculum," says its principal, Clarence DeLude. "To prepare students for a constantly changing world, we start from the basics of having caring teachers who work with parents to have every Our Redeemer student embody the spirit of Kulia I Ka Nu'u--striving for the highest."
No one should delude himself into thinking that our nation's leaders are unaware of these horrendous consequences.
It appears that's what happened here, and Bellesiles should be ashamed of himself for attempting to delude the public.
Most important, don't delude yourself into thinking that it's better to have tried and failed than never to have tried at all.
Did the 640,000 Canadians who signed a debt cancellation petition and the countless parishioners who pestered politicians on the issue delude themselves with a naive, unattainable vision?
Delude still gets nostalgic sometimes about the old days, when there was the trusty card catalog.
And how will we continue to delude ourselves into believing that yogurt muffins are health food once the nutritional analyzing software (sure to soon be a standard on all PDAs) gets through itemizing the ingredients?
PCR can also amplify minute contamination of DNA, such as an excavator's fingerprints, and delude scientists.