IRS attorneys will be even busier than normal next week, because another federal judge has told them to show up in court July 11 to defend the federal tax agency.

They will have to explain to U.S. District Court Judge Reggie Walton why the IRS shouldn’t be required to let an outside expert evaluate whether emails on the computer hard drives of former IRS official Lois Lerner and six colleagues really are lost forever, as the agency recently told Congress.