 Stuckists claim that conceptual art is justified by the work of Marcel Duchamp, but that Duchamp's work is "anti-art by intent and effect".The Stuckists feel that "Duchamp's work was a protest against the stale, unthinking artistic establishment of his day", while "the great (but wholly unintentional) irony of postmodernism is that it is a direct equivalent of the conformist, unoriginal establishment that Duchamp attacked in the first place".Manifestos have been written by other Stuckists, including the Students for Stuckism group.