Two appellate court justices appeared divided during oral arguments on whether home-rule authority permits the Cook County Board to outlaw pretrial detention in Cook County’s juvenile center for delinquent preteens.Justice Daniel J. Pierce’s questions for the assistant public defender, who was defending Cook County’s ordinance, revealed his skepticism that Cook County’s home-rule authority can overrule a Juvenile Court judge’s decision in cases with criminal defendants who are 12 years old or …