Inverity

It is a structure existing in the imagination. It cannot exist anywhere else, because it includes novelties like perfectly elastic bodies in perpetual motion. In making it, we are well aware of the inverity of some of its elements.

God knows, we have been offered enough minacious parables over the centuries to discourage both of these stubborn delusions — from The Iliad and Oedipus Rex to The Picture of Dorian Gray and "Richard Cory" — but still they survive, eternal inverities.