''See also:'' [[Irrational thinking]] and [[Evidence-based thinking]] and [[Intellectual humility]]
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''See also:'' [[Delusion]] and [[Pride]] and [[Superiority complex]] and [[Egocentric Thinking|Egocentric thinking]] and [[Hubris]] and [[Evidence-based thinking]] and [[Intellectual humility]]
* Unwavering [[belief]] that what they think is real despite all evidence to the contrary
* Unwavering [[belief]] that what they think is real despite all evidence to the contrary
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* Persistence of holding the belief in spite of all evidence to the contrary
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* Persistence of holding the [[belief]] in spite of all evidence to the contrary
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* Defensiveness when the delusionary belief is challenged
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* Defensiveness when the delusionary belief is challenged. See also: [[Denialism]] and [[Rationalization (Psychology)|Rationalization]]
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* Behaviorial changes that involved abnormal behavior
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* Person holding the delusionary belief has an exaggerated sense of self-importance. See also: [[Pride]] and [[Superiority complex]] and [[Egocentric Thinking|Egocentric thinking]] and [[Hubris]]
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* Person holding the delusionary belief has an exaggerated sense of their competence. See also: [[Dunning-Kruger effect]] and [[Intellectual humility]]