Signs of pathological liars

Anyone who exhibits a blah blah blah ... Personalities most often associated with a pattern of lying are those with sigs of ANTISOCIAL PERSONALITY DISORDER or NARCISSISTIC PERSONALITY DISORDER. If on the other hand, you are trying to ascertain whether someone has a destructive pattern of lying, look at their Words and their conduct in relation to your experience of them and what you know of their relationships with others. Accomplished liars lie to get what they want when they want it and without any regard whatsoever for the consequences of their lies and, when found out, they tend to lie some more without turning a hair. If a person in your life just doesn't ADD UP, if they've lied to your knowledge, if they continue to lie, if they continue to disappoint or fail to deliver and always have an excuse or they expect you to forgive yet another trespass, you are dealing with a LIAR and a damaging personality that you are best advised to avoid rather than to hold your breath waiting for this person to treat you with integrity, to honour their Word, honour the representations and so on.