Why is it so effective when gaslighters/narcissists continue their lie, even when there is easily accessed evidence to the contrary?  Because it tends to work.  First, [people can] get confused as to why someone would blatantly lie.  It goes against what you know as normal human behavior.  Most people, when caught in a lie, will admit to it and apologize. (Most people also tend to not blatantly lie in the first place.)  The more confusion [a person] feel[s] upon hearing the gaslighter/narcissist’s blatant lie, the more [they] start to remember the gaslighter’s defense or continued lying, not the actual truth that [the gaslighter] is lying about.

…Do gaslighters/narcissists believe what they are saying? It’s hard to tell. Is it possible that a lie has been told so much that the gaslighter/narcissist no longer knows the truth? It’s possible. …They act as if they really don’t care what you think about them. But at the same time, they are deeply concerned about being criticized.

…A simple “You are lying,” and then stating the facts is sufficient. Expect the gaslighter/narcissist to retaliate by calling you names, or another of their other personal favorites, ignoring you all together.

Why Narcissists And Gaslighters Blatantly Lie — And Get Away With It

hmmmm