I suppose it depends how you define "lie". When someone says something they know to be untrue, that is obviously a lie - but when someone persuades themselves to believe something that it suits them to say, it gets a bit more of a grey area.

And when they start to believe what they say, because they said it, that's a further twist - and in a sense someone who has achieved this ability is no longer capable of the relatively honest practice of telling a deliberater and conscious lie. That's quite a common situation among politicians and their most dedicated followers.