Auditory hallucinations (A), disorganized speech (C), and fixed, false beliefs (delusions) (D) are all cardinal symptoms of psychotic disorders, indicating a break from reality. A persistent, irrational fear of public speaking (characteristic of social anxiety disorder) where the patient *knows* the fear is irrational indicates intact reality testing and preserved insight, making it a neurotic disorder. The patient is aware their fear is excessive, even if they cannot control it.
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