The word “sophism” has an unfavorable connotation and means arguing deceitfully, attempting to turn a poor case into a good one by means of clever but ______ reasoning.
考查形容词辨析。A项implacable“不能安抚的，难和解的”，B项queer“奇怪的，异常的”，C项fictitious“虚构的，假想的”，D项specious“似是而非的，外表美观的”。由means arguing deceitfully（意思是欺骗性地辩论）和turn a poor case into a good one by means of clever but ______ reasoning（通过聪明但 ______ 的推理把一个糟糕的案例变成一个好案例）可知，空格处填入D项符合。句意：“诡辩”这个词有一个不利的含义，意思是欺骗性地辩论，试图通过聪明但似是而非的推理把一个糟糕的案例变成一个好案例。因此，该题选择D项。
