Please help with the sentences below. Independent Directions (Titile) In the furor over the lax behavior of directors, even Buffett has received heat. Recently, Calpers challenged his independence as a board director of Coca-Cola. In rebuttal, Buffett said that there is no substitute for thinking. There is no magic checklist that is going to tell you in all cases whether a director is independent. Q1: What is 'Calpers challenged his independence'? Q2: 'There is no magic checklist that is going to tell you in all cases whether a director is independent"?