Those who lie believing it is the truth are their own separate ilk and should be isolated on an island as lepers are for the well-being of everyone else.
Those who lie KNOWING they lie also must live with the ones who lie believing they don't. They belong together like PP&J and no one ought put them asunder from one another or each other till death them doth part.
Happy life without strife. Liars and LIAR BELIEVERS live each day being free of those who annoyingly insist on telling the truth. What could it hurt? Who would be harmed? Everybody WINS. Who has a problem with THAT?