state law. Many states have two or more levels of courts below the state supreme court; for example, in Pennsylvania, a case might first be heard in one of the Pennsylvania courts of common pleas, be appealed to the Superior Court of Pennsylvania, and then finally be appealed to the Supreme Court of Pennsylvania. In other states, including Delaware, the state supreme court is the only appellate court in the state and thus has direct appellate jurisdiction over all lower courts. Like the U.S. Supreme Court, most state supreme courts have implemented "discretionary review." Under such a system, intermediate appellate courts are entrusted with deciding the vast majority of appeals. Intermediate appellate courts generally focus on the mundane task of what appellate specialists call "error correction," which means their primary task is to decide whether the record reflects that the trial court correctly applied existing law. In a few states without intermediate appellate courts, the state supreme court may operate under "mandatory review", in which it must hear all appeals from the trial courts. This was the case, for example, in Nevada prior to 2014. For certain categories of cases, many state supreme courts that otherwise have discretionary review operate under mandatory review, usually with regard to cases involving the interpretation of the state constitution or capital punishment. One of the informal traditions of the American legal system is that all litigants are entitled to at least one appeal after a final judgment on the merits. However, appeal is merely a privilege provided by statute, court rules, or custom; the U.S. Supreme Court has repeatedly ruled that there is no federal constitutional right to an appeal. States with unique appellate procedures Iowa, Nevada, and Oklahoma have a unique procedure for appeals. In those states, all appeals are filed with the appropriate Supreme Court (Iowa and Nevada each have a single Supreme Court, while Oklahoma has separate civil and criminal Supreme Courts) which then keeps all cases of first impression for itself to decide. It forwards the remaining caseswhich deal with points of law it has already addressedto the intermediate Court of Appeals. Under this so-called "push-down" or "deflection" model of appellate procedure, the state supreme court can immediately establish final statewide precedents on important issues of first impression as soon as they arise, rather than waiting several months or years for the intermediate appellate court to make a first attempt