I'll go through the cognitive science behind it in part 5, but to summarize: When you're told the same lie over and over and over again it exhausts you mentally so it's easier to just accept it as the truth than to resist it. It's quite literally brainwashing.
I have 500 pages of videos, posts and comments by the narc repeating the same lies. 500 pages. He is perfectly aware that if he repeats the same lies enough times it'll become the truth, doesn't matter how ridiculous lie is.
This is dom, not diddlyroider. i am confused.