Regarding a recent article entitled, "Covert Narcissism," in what other areas may various mental health issues be difficult to detect? Are those gray areas solely unclear to those who are externally affected by said behavior, or can the person who possesses them also be in the dark? How much of the latter could be related to subconscious denial? And how often is the person who is prone these traits intentionally attempting to hide them from others in their circle?