“Untitled (Rorschach),” a 1999 work by Sigmar Polke.(Photo: Alistair Overruck/Estateof Sigmar Polke/Artists Rights Society) The current show of Sigmar Polke’s work at MOMA, Alibis: Sigmar Polke 1963-2010, is staggeringly expansive. With 260 works of art filling 10 galleries plus the atrium, the curators wisely moved most of the accompanying text into a 30 page handout […]