Most Helpful Guy
According to some psychologists, Compulsive liars tell the stories they think want to be heard, while pathological liars continue to lie when they know you know they’re lying. So, yes, they know they are lying but they can not stop doing it.
Most Helpful Girl
They know. Some people are very delusional and can't be wrong. But in my opinion, not every pathological liar is delusional and not every delusional person is a pathological liar.