I took the liberty to correct the phone typos in your post, sorry if I missed any:
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In fact, why this young man's treatment likely exacerbated his psychopathic acumen, is because it gave him an entirely new language to dissimulate with. Why the psychopath is untreatable, is because it is a "lying" disorder. The essence of psychopathy is profound dishonesty. It is an inversion of meaning, an inversion of the order, where good becomes bad and bad becomes good. Where kindness is reformulated through the process of the ultimate lie, which is a perversion in the thinking processes. Evil triumphs. It is strong and good. The psychopath has only the machinery of perverse reasoning to use to cogitate reality. Thus he lies not only to others but necessarily lies to himself about himself.
Because of this endogenous dishonesty, he is intrinsically incapable of telling the truth. Thus he cannot accurately self-assess. He can never formulate a truthful thought due to this profound mental perversion that is the hallmark of this disorder. He has only acquired more slick, refined and better labguage to dissimulate others as a "treatment success." Thats why so many of you were duped into feeling empathy for him. He is simply pulling for it in you, but he has no empathy for you. It is all just a game for him. There is nothing genuine about his letter. Feeling empathy for a psychopath is a fools game. That is like having the profound mental perversion that is the hallmark of this pernicious disorder. He only coopts new slicker, more refined language as a "successfully therapized".