2. 外语
  3. Each of two particular inspection systems that are based on different principles would detect all product flaws but would also e

Each of two particular inspection systems that are based on different principles would detect all product flaws but would also e

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问题 Each of two particular inspection systems that are based on different principles would detect all product flaws but would also erroneously reject three percent of flawless products. Assuming there is no overlap between the products erroneously rejected by the two systems and also no interference between the systems if both operate, using both systems and rejecting only those products found flawed by both would be a way of avoiding all erroneous rejections. Which of the following most precisely characterizes the reasoning in the argument?
选项 A、The reasoning is conclusive; that is, the conclusion cannot be false if the statements offered in its support are true.
B、The reasoning is strong but not conclusive; if the statements offered in support of the conclusion are true, they provide good grounds for that conclusion, though it is possible that additional information might weaken the argument .
C、The reasoning is weak; the statements offered in support of the conclusion, though relevant to it, by themselves provide at best inadequate grounds for the conclusion.
D、The reasoning is flawed in that the conclusion is no more than a paraphrase of one of the pieces of evidence offered in its support.
E、The reasoning is flawed in that the argument treats evidence that a factor is necessary to bring about an event as if it were evidence that the factor is sufficient to bring about that event.
答案A
解析 本题为GRE国内1991年2月考题。本题的五个选项所描述的逻辑关系都比较抽象，阅读这些选项具有一定的难度，但只要考生思路清晰，要解答对这道题并不难。根据题中所给的条件可以看出本题的结论依赖的条件很充分，如果本题中有关两套检查系统的陈述是正确的，那么我们根据这些条件很容易得到本题的结论。也就是说本题的结论无可质疑，因此本题的推理是结论性的。由以上分析可知(A)是正确答案。请注意本题的五个选项的翻译，并请读者自己试译这五个句子。
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