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超时。。
=====================ARGUMENT187==================<br />
The following appeared as part of an article in a health magazine. <br />
"A new discovery warrants a drastic change in the diets of people living in the United States. Two scientists have recently suggested that omega -3 fatty acids (found in some fish and fish oils) play a key role in mental health. Our ancestors, who ate less saturated fat and more polyunsaturated fat, including omega -3 fatty acids, were much less likely to suffer from depression than we are today. Moreover, modern societies—such as those in Japan and Taiwan—that consume large quantities of fish report depression rates lower than that in the United States. Given this link between omega -3 fatty acids and depression, it is important for all people in the United States to increase their consumption of fish in order to prevent depression."
The argument is well-presented, but not well-reasoned. The article begins by stating the relationship between omega-3 fatty acids and mental health. By making two comparisons of our ancestors, people who ate more polyunsaturated fat and therefore less suffered depression, with modern man, people who take less fish and subsequently more frequently; and of Japanese and Taiwanese, people who consume large number of fish and result lower ratio of depression, with Americans, people who consume small number of fish and consequently higher ratio. The argument for increasing the consumption of fish in USA in order to prevent depression seems logical.
However, the arguer is failing to consider other possible alternatives about Americans depression. Such alternatives may conclude the fact that plenty of changes have happened within so long period (from ancient time to current days) or the confused extend of things in ancient period is lighter than modern people as well as less frequently. It is possible that high speed living pace and questions appeared in nowadays making modern people are having faced more troubles which we have never met before. In addition, the arguer has failed to consider the living habit and diet habit of different areas. Perhaps people in Japan and Taiwan doing everyday exercise is more conducive to keeping lower depression ratio, and besides fish they might eat more vegetables and less waste-food to keep body fit which will finally influence mental health, while the American is more likely to eat more waste-food and exercise less.
The article is one-sided argument about increasing Americans consumption of fish to prevent depression. The author may be a businessman who deals with fishing business, a nutritionist who believes more fish taken will benefit human health, or just an ordinary people in the USA. No matter who the author is, there are many aspects of this suggestion that he/she has overlooked or chosen to ignore. Large consumption of fish in USA family means heavier load. Not all the people in USA can afford such high quality protein food and also not all people in USA are suitable for eating such kind of high ratio of allergic food. Even accepted these, one cannot promise that the sorts of fish, the American chosen, have enough omega-3 acid for daily taken. Since no more details is given in the argument about the exactly effective contains of omega-3 for mental health, the arguer’s conclusion is ridiculous.
The arguer’s recommendation “increasing the consumption of fish to prevent depression in USA” is easily arguerable. Even accepted all the possibility of problems above, from the research of the two scientists suggested that mental health link with omega-3, while the depression is one kind of mental disease which cannot deduce that omega-3 will be conducive to deducting the ratio of depression. Also omega-3 acid does not exist in every kind of fish, we can not just increase the consumption of fish to get omega-3 such kind of action might cause unexpected result. Additionally, the validity and reliability of the research is reasonable for us to doubt.
Overall, the reasoning behind the increasing the consumption of fish to prevent depression in USA seems logical as presented above, the arguer is acting in their own best interest. However, before any final decision is made out, the arguer should evaluate all the possible alternatives and causes for high ratio of depression in the United States as compare to our accentors and Japanese or Taiwanese. Also the arguer should inform more evidence to prove that omega-3 acid has link with depression and American can obtain adequate omega-3 acid from the fish they can afford.
[ 本帖最后由 强夫 于 2007-11-3 14:36 编辑 ] |
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