Graham Priest, "It Is and It Isn't,"  Aeon - http://bit.ly/2dmhxkB. The essay explores Duchamp's Fountain which was part of his pioneering work in Dadaism. This latter movement influenced a range of thinkers, including Karl Barth. It is also interesting that the notion of truth being discussed here is related to the Greek notion of aletheia, and it strikes me akin to Heidegger's notion of unconcealedness.