Definition: "A sociopath is typically defined as someone

Definition: "A sociopath is typically defined as someone who lies incessantly to get their way and does so with little concern for others. A sociopath is often goal-oriented (i.e., lying is focused—it is done to get one’s way)."

https://www.truthaboutdeception.com/lying-and...liars.html

Someone who thinks that if they just keep repeating their lie, eventually people will believe them, seems to qualify as a sociopathic liar.