People who have specialized knowledge about a scientific or technical issue are systematically excluded from juries for trials where that issue is relevant. Thus, trial by jury is not a fair means of settling disputes involving such issues. Which one of the following, if true, most seriously weakens the argument? ['The more a juror knows about a particular scientific or technical issue involved in a trial, the more likely it is that the juror will be prejudiced in favor of one of the litigating parties before the trial begins.', 'Expert witnesses in specialized fields often command fees that are so high that many people involved in litigation cannot afford their services.', 'The more complicated the issue being litigated, the less likely it is that a juror without specialized knowledge of the field involved will be able to comprehend the testimony being given.', 'Appointing an impartial arbitrator is not a fair means of settling disputes involving scientific or technical issues, because arbitrators tend to favor settlements in which both parties compromise on the issues.']