新GRE逻辑单题10套 第4套7题,求教.Each of two particular inspection systems that are basedon different principles would detect all product flaws butwould also erroneously reject three percent of flawlessproducts.Assuming there is no overlap

新GRE逻辑单题10套 第4套7题,求教.Each of two particular inspection systems that are basedon different principles would detect all product flaws butwould also erroneously reject three percent of flawlessproducts.Assuming there is no overlap
新GRE逻辑单题10套 第4套7题,求教.
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?
(A)The reasoning is conclusive,that is,the conclusion
cannot be false if the statements offered in its
support are true.
答案就选A,其他选项我知道都不对,就不列出来了.
关键是这句话：
using both systems and rejecting only those products
found flawed by both would be a way of avoiding all
erroneous rejections.
我的理解是,两个系统都用,然后只去掉那些同时被发现为次品的产品,就可以避免漏掉任何次品了.但是,“同时被发现为次品的产品”都是真正的次品呀,怎么能被去掉呢?如果是从数量上讲,减去重叠部分的数量,那还可以理解,但是这里没说数量关系啊?

新GRE逻辑单题10套 第4套7题,求教.Each of two particular inspection systems that are basedon different principles would detect all product flaws butwould also erroneously reject three percent of flawlessproducts.Assuming there is no overlap
不明白你在纠结什么,你这个不是对选项的不理解,而是对文章的不理解.人家文章说了这俩系统就是检测次品的啊,真正的次品检测出来当然要去掉了,要不然检测干嘛啊……而且你的理解也是错的啊,文章都意思是说两个都检测为次品时,可以完全避免单独检测时那3%的错误检测

这个不是说避免把正品当成次品去掉吗？两个都说是次品，且着两个系统没有重叠，都是3%把正品当成次品。同时说是次品就肯定是次品了吧，如果一个说是次品，另一个说是正品，说明有一个系统把正品当成次品了，就出错了，为了避免这种错采去掉同时检验为次品的
but would also erroneously reject three percent of flawless products会错误的抛弃...

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这个不是说避免把正品当成次品去掉吗？两个都说是次品，且着两个系统没有重叠，都是3%把正品当成次品。同时说是次品就肯定是次品了吧，如果一个说是次品，另一个说是正品，说明有一个系统把正品当成次品了，就出错了，为了避免这种错采去掉同时检验为次品的
but would also erroneously reject three percent of flawless products会错误的抛弃3%的次品？
是 flawless 不是次品，flaw是有有问题的，flawless是本来没问题，但是机器检验错了，认为是有问题的东西，这个是正品，不该被reject的

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