Argument71 （12月作文高强组——好好学习，天天作文）

一月一号UID: 2148376

TOPIC: ARGUMENT71 - Copper occurs in nature mixed with other minerals and valuable metals in ore, and the proportion of copper in the ore can vary considerably. Until fairly recently, the only way to extract pure copper from ore was by using a process that requires large amounts of electric energy, especially if the proportion of copper in the ore is low. New copper-extracting technologies can use up to 40 percent less electricity than the older method to process the same amount of raw ore, especially when the proportion of copper in the ore is high. Therefore, we can expect the amount of electricity used by the copper-extraction industry to decline significantly.
WORDS: 376          TIME: 0:46:47          DATE: 2006-11-21

1.他提供的数据并没有指出铜的含量比例
2.就算是这个方法可行也不能推断用电会减少，因为他没考虑开采铜的质量和数量。

The notion above that the amount of electricity used by copper-extraction industry will decline significantly by applying new copper-extracting technologies seems somewhat reasonable. To convince us of his conclusion, the arguer cites statistics that new technologies can use up to 40 percent less electricity than the older method to process the same amount of raw ore. However after close scrutiny, the logical laws of this argument would be uncovered.

  The threshold vice of this notion is that the statistics cannot make any prove to the author's conclusion. She/He fails to provide us the proportion of the copper in the ore that is extracted by new technology. It is possibly that the author use the amount of electricity, which used by new technology to extract ore with high proportion of copper, to compare with the amount of electricity used by old methods but to extract ore with low proportion of copper. Then, perhaps the arguer obtains the statistics that applying new technology would decrease the consumption of electricity. As the notion shows that both the old and new methods would acquire larger amount of electricity when the proportion of copper in the ore is low. Thus, if the author cannot provide the proportion of copper in the ore, his statistics would be unconvincing.

  Further, even the new technology can use up to 40 percent less electricity to process the same amount of raw ore as the author cites, supposing that the ore is with same proportion of copper, she/he cannot deduce that the amount of electricity in the copper-extraction industry will decline significantly. It is at least likely that the ore explored recently, the quality of which is not as good as before, is with lower copper proportion. If then, the copper-extraction industry may even demand larger amount of electricity. Moreover, it is also likely that the quantity of the ore may increase, which would consume more electricity also. Thus, I can not approve this conclusion unless the author excludes this possibility.

  To sum, this argument fails to provide enough proof to his statistics and thus it can contribute noting to his conclusion. Besides, the author fails to take the quality and quantity of the ore. To lobster her/her assertion, she/he should state what I argued above.
  个人评价：理由太少了，语言上也很单调