Since last spring, when Detroit's emergency manager, Kevyn Orr, said that he might have to sell art from the city-owned collection of the Detroit Institute of Arts to help pay off the city's $18 billion in debt, the museum has been operating in a state of unreality. Less than a year after voters in three nearby counties approved a property tax to fund the DIA for 10 years, the museum's survival was again endangered. And last week, on the day that Judge Steven W. Rhodes of U.S. Bankruptcy Court approved the city's Chapter 9 filing and allowed Mr. Orr to proceed with his restructuring plan, creditors balked at the less-than-a-billion-dollar...