"Given the adversarial nature of our legal system, it is ordinarily necessary to hold a litigant to the way in which the case is presented by that litigant's legal representatives. This is true of criminal as well as of civil litigation. In a criminal trial, a judge has a duty to put to a jury any basis upon which they might find for the accused, whether or not that basis has been raised by the accused's legal representatives. This duty lies in reserve. In a sense, it helps to ensure against oversight, mistake or unevenness in the quality of legal representation which is an unavoidable feature of any trial system. That notwithstanding, the general rule is that, particularly in a criminal trial, a judge must be extremely cautious before intervening. One reason for such restraint is that, while the trial is proceeding, the judge may have insufficient materials upon which to understand why a particular course has been adopted. Ordinarily, it will be presumed that legal representatives will decide upon trial tactics in the best interests of their client and, in important matters, upon express instructions. Out of an appreciation that serious mistakes can sometimes arise from incompetence, ignorance or inexperience, courts of criminal appeal have developed rules to safeguard accused persons from the risk of miscarriage of justice where serious default on the part of legal representation is shown. However, this does not mean that every tactical decision, considered with hindsight to have been misjudged, opens the door to a ground of challenge to the jury's verdict. Such a rule would be intolerable and unworkable. It would seriously undermine the finality of litigation which is important in criminal as it is in civil trials. All of this was said, in terms which I would accept, by the Full Court of the Supreme Court of Victoria in Re Ratten, and recently endorsed by the Court of Appeal of that State in R v Miletic: