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==================Argument165. 525 words in 40minutes==================== In this analysis, the arguer advocates that the cans of tuna by Promofoods did not contain chemicals that posed a health risk. To substantiate the conclusion, the arguer points that the chemists testified that eight chemicals most commonly blamed for causing dizziness and nausea, five were not found in the tested cans. Additionally, the three remaining suspected chemicals are found in all other kinds of canned foods but not in the cans of tuna. In my point of view, the argument suffers from several flaws as follows.
To begin with, the most egregious reasoning error is the fallacy of hasty generalization that the arguer asserts five chemicals were not found in the tested cans, which means the cans of tuna by Promofoods did not contain chemicals that posed a health risk. First, it is possible that besides such eight chemicals most commonly blamed for causing symptoms of dizziness and nausea, there will be some other chemicals give rise to the similar symptom. Maybe such chemicals exist in the eight million cans of tuna last year, and have never been discovered yet. Or the cans of tuna besides the returned eight million ones have such chemical, which bring about the dizziness and nausea. Without considering such instances, the arguer can not persuade us the conclusion is convincing.
Secondly, the premise of the conclusion is unwarranted. The arguer cites the chemists did find that the three remaining suspected chemicals are naturally found in all other kinds of canned foods. However, all canned foods contains such chemicals does not mean they arehurtless in the cans of tuna. It is possible that they are superfluous comparing with the lever of standard contain in the cans of tuna. What’s more, these three remaining suspected chemicals exist in different food may result in different effect, perhaps in tuna cans may bring out stronger symptoms. Thus, it is fallacious to reach any conclusion at all in the face of such limited evidence of the exactly data of the chemicals.
In addition, the test reported by the arguer is too vague to support any firm conclusion that the cans do not contain chemicals posing a health risk. Obviously, the arguer does not provide assurances these samples of tuna cans have representative of overall amounts of the eight million cans. Perhaps the chemists from Promofoods tested only samples of the recalled cans, which just 100 cans. It is possible that the survey is not reasoned, and can not be representative of all recalled ones. We are told nothing about the exactly and sound information about the total amounts of samples, and maybe the five chemicals which commonly blamed for causing dizziness and nausea also exist in the other cans, or in the work off cans. Therefore, the analysis of the test is unwarranted based on the limited evidence.
As it stands, the argument seems to be plausible. In fact, not only does it leaves out of key issues, but also cites by the arguer, which does not strongly support the evidence. To make it logically acceptable, the arguer should judge of all possible alternatives before any final conclusions are made by the Promofoods.
==================Argument56. K的考古学家 雕刻====================
Syllabus:
1. 论断:K的艺术家是用实际人体做模型来雕刻的。因为考古学家最近在K发现了一些人头和手的模型。这个发现解释了为什么K的小雕塑是抽象的完全另一种风格,因为模型只能用来做真人大小的雕刻。它同时也解释了为什么很少有古K的工具被发现。论者还认为这将使得真人大小的雕像价值下降,小型雕像价值上升。
2. 论断很武断。首先,就算这些模型是用来雕刻的,但并不能得出K的所有人体大小的雕像都是用这种方法制作出来的。毕竟被发现的也只是一些头部和手部的模型,这至少不能排除其它部位不用这种方式制作;其次,缺乏根据。论者认为这个发现将使得大雕像价值下降,小雕像价值上升。但论者并没有提供任何资料证明用模型做的雕像就不值得研究,或是收藏家们对于人体模型很反感,或是他们对小雕像的兴趣有所增长。
3. 论断的前提不一定成立。前提是这些人头和手的模型是用来做雕刻的。但是论者看来只是在猜测,因为他没有提供任何有关与这些被发现在模型有关的雕像。没有资料显示有雕像是根据这些模型做出来的。
4. 论断的论据没有说服力。论者认为K的小雕像与大雕像风格迥异,而且都很抽象,正是因为他们无法用人体做模型。但是论者没有提供资料证明小雕像与大雕像的用途创作者是否一样,因为这些都会使得两者之间存在风格差异,而不一定是因为模型的问题。另一个论据是说很少有K的雕刻工具被发现出来,但这并不能说明K的工具很少,人体是K的工具。因为工具有可能是因各种原因被毁坏了,或者仅仅是考古学家还没有找到而已。
5. 结论:论者若要加强说服力,还需要提供资料解释是否有雕像是用这些模型做出来的,并还需要提供有收藏家对这一发现的看法。 |