本帖最后由 carol.lj 于 2010-5-1 17:31 编辑
逻辑:
1水杨酸酯和阿司匹林只是同一类化合物,虽然阿司匹林可以用来不治疗头痛,但水杨酸酯不一定与阿司匹林具体相同的功能。
2头痛发病平均数量下降的原因可能有其他的药品,或者是心态,心理的养状况变好了。
3水杨酸酯可以被用作食品香料,但根据这种用途,不一定会得到居发头痛症的数量持续稳步下降。因果不必然。
4样本的问题,参与调查的人数是未知的,得出的结论不一定是科学的。
In this argument, the author concludes that the number of headaches suffered by the average citizen of Mentia will decline with the use of salicylates. To support his conclusions, the author cited a twenty-year study, and claim that salicylates are correlated with the decline of headaches and salicylates are members of the same chemical family as aspirin. At first glance, this argument seems to be logical, but after taking many things into consideration and clearly examining the author's reasoning, these evidences will neither provide a logical support, nor be practical and the argument contains several facets that are questionable.
Firstly, the very noteworthy problem concerned to the argument is that salicylates may not have the same effect just as aspirin even they are both the members of the same chemical family. Perhaps, the specific chemical structure would lead salicylates have partial effect of the asprin, but not all, since there are still other components with salicylates. And the arguer fails to tell us where comes out the conclusion about the some chemical family. is the result reliable? Furthermore, there is no information available to prove that whether both salicylates and aspirin have the same effect on headaches treatment. On several grounds, these evidences lend little credible support for the conclusion.
Even if the salicylates may have the same effect just as aspirin, can we draw a conclusion that a steady decline of headaches is merely due to the commercial use of salicylates? The answer is obviously no. On the one hand, the author ignores the possibility that headache may be declined by various facets, with less pressure and radiation; on the other hand, perhaps the participants in the experiment have taken other chemical materials which can solve headache disease in physical level. Thus, we should treat them from both physical and psychological facts. It would be too hasty to predict that the salicylates correlate with the steady decline of headaches, without enough evidence.
In addition, the author doesn't tell us what kind of food will contain the salicylate additives and whether the local citizen would like to buy such food. Flavor additives are not for all kinds of food, and perhaps the food with salicylates is just the one people dislike in that area. Thus it is possible this use can not help, or the declination is caused by other medication that we have not found out.
Last but not least, there is a problem with this argument involves a survey itself. The author provides no evidence that the number of participants is statistically significant. Lacking the information about the randomness and the size of the survey sample, the author cannot draw any precise conclusions based on the survey.
In sum, this argument, while seems well-supported at first, has several flaws as discussed above. Hence it is unacceptable.Before any final decisions are made, the author should reason more convincingly, cite more persuasive evidence, and take every possible consideration into account.
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