“Gaslighting” is a term well-known in the psychological counseling community, especially among those dealing with narcissistic personality disorders. It refers to the technique used by a narcissist to convince his victim that what he sees with his own eyes is not true, and hence, he must be going crazy. If the victim catches the narcissist in the act of some foul deed or betrayal, the narcissist will deny his guilt with such passion and apparent sincerity that the victim is tempted to believe him, despite the evidence of his own eyes. The technique is especially effective as a long-term strategy -- the victim or enabler is worn down by repeated assertions that what he just saw or knows to be true is actually false, to the point where he doesn’t have the strength to resist anymore.
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