argument142 [0710G 戴三个表冲刺小组] 第12次作业

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Syllabus:
1.只是发现了iron能够increase risk of heart disease,并没有依据来证明。而且即使有，多少是high level了，我们知道一定量的铁对人体是非常有好处的。
2.即使过量的铁会引起heart disease，文中并没有提到red meat中含多少的铁，是否认为是过量的铁，而且那种铁的形式是引起heart disease的，red meat中含的是不是这种形式的铁
3.即使red meat中含有满足要求的一定量的可以引起heart disease的铁，但并不排除其中含有其他的成分，这些物质更能引起heart disease。即heart disease是由这些物质引起的，或者说是由这些物质和铁一起引起的，而不是铁引起的。  

TOPIC: ARGUMENT142 - 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.

WORDS: 407          TIME: 00:29:44          DATE: 2007-8-7 2:08:03

In the article entitled "Eating Iron" the author draws the conclusion that the correlation between high iron levels and heart disease is most probably a function of the correlation between red meat and heart disease. The arguments are problematic in several respects, thus render the conclusion unconvincing as it stands.

First, a study reported in the article found a correlation between high level of iron in diet and increased risk of heart disease. The author provides absolutely no information or data to support the result of this study, nor did the author gives the cause-and-effect relationship between high level of iron and increased risk of heart. Without this information the further argument will be meaningless.

Second, even assume the validity of the study, the author fail to provide the information of how much iron can reach high level, because we all know that moderate amount of iron will be beneficial to our heath. And the author did not provide further information of what form of iron causes an increased risk of heart disease since iron exists in diverse forms in the world. It is highly likely the iron in red meat does not reach the so-called high level or the iron is in the form other than the forms which will cause increased risk of heart disease. In this case, the correlation between red meat and heart disease cannot be interpreted by the correlation between iron and heart disease.

Finally, even the author can present evidence that the there high level iron in the specified form in red meal, it is not sure that it is solely these iron which caused the increased heart disease. There are highly possiblely other elements in red meal which contribute more to heart disease than iron.  Thus it is effects of these elements which cause the heart disease when people eat the red meal, or at least the combined effects of these elements and iron along which cause increased heart disease.

In sum, to convince me that it is the iron in red meal which causes increased risk of heart, the author need provide information of cause-and-effect relationship between iron and increased risk of heart disease. And author also need present detail information of how much iron can be called high level and which form of iron can cause heart disease. To better assess the argument, I need the author to rule out the possibility that there are other elements in red meal which can also cause heart disease.

[ 本帖最后由 pinuo 于 2007-8-7 02:43 编辑 ]