Do they really follow their own lies?

They have a well constructed fantasy world where they have specific scripts for different situations that they run into.. if the subject is cheating, they just insert who-ever's name is relavant in the conversation,,,,, if the subject is about a promise they're not keeping, they have several scripts they go to and just switch out what-ever you're angry at at the time..  
It's all a game for them and we don't know the rules until we can figure them out,, and then the narc doesn't want to play anymore..