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The covert borderline is a new subtype of Borderline Personality Disorder (BPD) more common among men. It is different to the classic and to the shy or quiet subtypes. Both the Covert and the Classic act out while the shy or quiet acts in. The covert borderline borrows features from the classic narcissist and from the primary psychopath. The classic variant is grandiose and reacts as a secondary psychopath would to stress and ego dystony.