Several who post here have mentioned that they have been through this experience with loved ones. In the interest of educating ourselves, I wonder if those who have had this experience would share with those of us who have not experienced this. If a child, at what age did it start? How was it handled? Any mental illness diagnosed? Other behavioral problems? How did other family members/loved ones react? Obviously when this is a loved one, you continue to love them despite this flaw. How do you deal with them as children? How do you deal with them as adults? In my own way, I am dealing with this now with a beloved family member. But the person is elderly and I think dementia is taking its toll. But I can see that when you catch a person in numerous outright, verifiable lies -whether dementia inspired or not - it does make you question EVERYTHING and ANYTHING they tell you. I have ended up that I take NOTHING as truth and I verify EVERYTHING. (I have also found, through verifying now, that several really important "family facts" that were told to me over the years by this person were also outright lies. So makes me wonder if this personality trait has not been long-standing and only now being found out by me.) I would welcome as much as anyone would want to share about this.