pathlogical liars

If any of you have ever known a pathlogical liar you will recognise the symptoms
1.the habit becomes so ingrained they can never shake it
2.they are clever and usually include some element of truth in the lie
3.as their lies continue to work they become bolder
4.they act outraged when challenged
5.eventually everyone except the most naive wakes up to them and discount everything they say
6.they get very hurt for even when they tell the gospel truth they are not believed
7.their lies then get even more outrageous as they try to retrive the situation.