“For nine years, [the museum] has been foraging for answers to some of the most confounding questions raised by Minimalist and conceptual art from the 1960s and ’70s: What makes a work genuine? If an artist decides he prefers an earlier or later iteration of his original work, which one should have pride of place in a museum? If an artist disowns a work altogether, how should the museum label and classify it?” The issues arise from the Guggenheim’s famous Panza Collection, acquired from 1990 to ’92. – The Art Newspaper