Delusion, denial

Webster's dictionary says;
Definition of DELUSION
1: the act of deluding : the state of being deluded
2a : something that is falsely or delusively believed or propagated b : a persistent false psychotic belief regarding the self or persons or objects outside the self that is maintained despite indisputable evidence to the contrary; also : the abnormal state marked by such beliefs
— de·lu·sion·al \-ˈlüzh-nəl, -ˈlü-zhə-nəl\ adjective
— de·lu·sion·ary \-zhə-ˌner-ē\ adjective
See delusion defined for English-language learners »
Examples of DELUSION
He has delusions about how much money he can make at that job.
He is living under the delusion that he is incapable of making mistakes.
She is under the delusion that we will finish on time.
As the illness progressed, his delusions took over and he had violent outbursts.
Origin of DELUSION
Middle English, from Late Latin delusion-, delusio, from deludere
First Known Use: 15th century
Related to DELUSION
Synonyms: chimera, conceit, daydream, fantasy, dream, fancy, figment, hallucination, illusion, nonentity, phantasm (also fantasm), pipe dream, unreality, vision
Antonyms: truth, verity
Related Words: ignis fatuus, mirage, will-o'-the-wisp; brainchild, idea; concoction, fable, fabrication, fiction, invention; envisaging, imaging, visualization; cloud-cuckoo-land, cloudland, Shangri-la, utopia; daymare, nightmareNear Antonyms: actuality, fact, realitysee all synonyms and antonyms
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Synonym Discussion of DELUSION
delusion, illusion, hallucination, mirage mean something that is believed to be true or real but that is actually false or unreal. delusion implies an inability to distinguish between what is real and what only seems to be real, often as the result of a disordered state of mind . illusion implies a false ascribing of reality based on what one sees or imagines . hallucination implies impressions that are the product of disordered senses, as because of mental illness or drugs . mirage in its extended sense applies to an illusory vision, dream, hope, or aim .


I have to add; if one is told a lie often enough, like daily, day in and day out, for years on end without swaying from the lie, most people, especially children, are likely to believe the lie.
For them, delusion or denial is truth.

When someone eventually discovers the truth and has absolute evidence that would stand up in any court, they are no longer deceived or delusional if they believe the truth rather than the lie.

Those who, when given the truth, refuse to believe it, they are choosing denial/delusion over facts, and making up thier own prefered reality.
Hence; that person or those persons are the ones suffering under a delusion.

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It is so difficult to wait for family members to wake up to truth, even if they deem it to be ugly, the truth is something we must be bold about and face.
I keep praying for a change in this situation, as it makes a stronger rift between sisters........ myself and one particular sister.
My other sister is able to at least half-believe me. Her fiction of a good father makes her happy. She is always kind to me though, and probably knows deep down I am truthful.