In ancient Roman times, in order to ensure the fairness of the trial of judges, judges often did not actively collect or investigate evidence, but only used the evidence submitted by both parties to determine the facts of the case during the trial of the case. Before the trial of the case, the judge Knowing the facts of a case is often unaware of it, which helps to prevent judges from forming unreasonable preconceptions about the facts of the case and avoid prejudice. Regarding this text, what is the following understanding? ["Fairness is the number one factor in a judge's trial.", "Preconceptions can have a serious impact on a judge's fair decision.", 'Without procedural justice, there is no guarantee that justice will be achieved.', 'The judge knows nothing about the facts of the case, which is conducive to a fair trial.']