A Minute Meditation

In the arts, one must distinguish, of course, between the lie and the tall story that the audience is not expected to believe.  The tall-story teller gives himself away, either by a wink or by an exaggerated poker face: the born liar always looks absolutely natural.

-- W. H. Auden --
from his Introduction to The Complete Poems of Cavafy

Born liars look like they are telling the truth and that they actually believe what they are saying, even to the point that contradictory lies never bother them.  They just blame the ones who expose their contradictory tales.