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[a习作temp] Argument142 挑战红肉,留argu链必回拍 [复制链接]

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发表于 2008-2-1 15:49:02 |只看该作者 |倒序浏览
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The article entitled 'Eating Iron' in last month's issue of Eating for Health reported that a recent study found a correlation between high levels of iron in the diet and an increased risk of heart disease. Further, it is well established that there is a link between large amounts of red meat in the diet and heart disease, and red meat is high in iron. On the basis of the study and the well-established link between red meat and heart disease, we can conclude that the correlation between high iron levels and heart disease, then, is most probably a function of the correlation between red meat and heart disease.
提纲:
A  correlation不代表positive,有关联不代表牛羊肉食用越多,越容易得心脏病,而可能正好相反
B 其他食物也可能含铁,没有证据说明study中使用了牛羊肉。
C 即使使用了牛羊肉,可能牛羊肉与心脏病的联系并不通过铁起作用。也就是说铁与心脏病的联系与牛羊肉无关,牛羊肉中的铁与牛羊肉和心脏病的联系也无关。

   In this argument, the author concludes that the correlation between red meat and heart disease is most probably a function of the correlation between red meat and heart disease. To support this argument, the author cites a study which reports a correlation between high levels of iron in the diet and increased risk of heart disease, the author also points out the fact which is thought to be well established that there is a link between large amounts of red meat in the diet and heart disease and red meat is high in iron. However I find that this argument is based a series of unsubstantiated assumptions, which renders it unconvincing as it stands.
   First of all, the author assumes that people eat more red meat will have more chance to get heart disease. Yet I find this critical assumption is not well supported. The mere fact upon which the author gets this assumption is the correlation between large amounts of red meat in the diet and heart disease. The logic and commonsense inform me that link between two does not mean the positive relationship, it is entirely possible that people who eat more red meat is those people who will not get heart disease. Without clearer definition about the link, I can not be convinced that the link of red meat and heart disease has anything to do with the correlation between iron and heart disease.
     Secondly, even if I were to concede the link exits between the large amount of read meat and increase risk of heart disease, the author fails to provide any evidence to prove that the study mentioned in the article form an issue of Eating for health does use red meat. It is probable that in that study, researchers don’t use read meat at all. In that case, the function that author concluded can not be established. Since this argument leaves this possibility, the author’s conclusion is dubious at best.
      Last but not least, even assuming the link is positive and red meat is used in the study, the author can not reasonably get the function between the study and the fact. The author assumes too hastily that the high level of iron in red meat have some effect on the link between red meat and heart disease. It is possible that the iron which has correlation with heart disease is not the same as the iron contained in red meat in chemistry character. Lacking evidence that the link between red meat and heart disease is the function of iron in red meat, I can not accept the function the author concluded.
      In sum, the scant evidence the author cites proves nothing about the function concluded by this argument, in fact, these evidences only serve to refute the author’s own argument. To strengthen the argument, the author must provide clearer explanation about the link between red meat and heat disease. In order to better evaluate the conclusion, I also need more information about the study of link between iron in diet and heart disease.

[ 本帖最后由 zxwind 于 2008-2-1 15:50 编辑 ]
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