Moral discourse is Unicorn talk

Moral discourse suffers from what is called “presupposition failure,”

: moral discourse presupposes, morals that are supposedly inherently normative, therefore  objectively prescriptive properties, 

presupposing objectively prescriptive properties, when there aren't any is t there aren't any, is 

Unicorn talk. 

Virgin Mary holding the unicorn (c. 1480), detail of the Annunciation with the Unicorn Polyptych