Über Wahrheit und Lüge im außermoralischen Sinn

On Truth and Lies in a Nonmoral Sense (German: Über Wahrheit und Lüge im aussermoralischen Sinne, also called On Truth and Lie in an Extra-Moral Sense) is a philosophical essay by Friedrich Nietzsche. It was written in 1873, one year after The Birth of Tragedy, but was published by his sister Elisabeth in 1896 when Nietzsche was already mentally ill.