[a习作temp] Argument45 Cracking Aw小组3月20日作业 [复制链接]

chrisplyn
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发表于 2010-3-21 08:39:48 |显示全部楼层

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sunmintijmu
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发表于 2010-3-21 16:24:03 |显示全部楼层

TOPIC: ARGUMENT45 - The following appeared as an editorial in a wildlife journal.

"Arctic deer live on islands in Canada's arctic region. They search for food by moving over ice from island to island during the course of a year. Their habitat is limited to areas warm enough to sustain the plants on which they feed, and cold enough, at least some of the year, for the ice to cover the sea separating the islands, allowing the deer to travel over it. Unfortunately, according to reports from local hunters, the deer populations are declining. Since these reports coincide with recent global warming trends that have caused the sea ice to melt, we can conclude that the decline in arctic deer populations is the result of deer being unable to follow their age-old migration patterns across the frozen sea."
WORDS: 339       TIME: 00:32:24       DATE: 2010-3-20 23:32:26

  The author concluded that the decline in arctic deer population is the result of deer being unable to follow their age-old migration patterns across the frozen see. The notion above seems at first glance would be as an obvious conclusion. While clearly examining the author's reasoning, we may find that it is unconvincing. The argument contains several facets that are questionable.
  Firstly, author's evidences are insufficient to support the conclusion. "Reports from local hunters" is incredible. One reason is that the hunters who reported the reports could not represent the whole hunters in Arctic- that is the rest don't think the deer populations are declining. The other reason is that the hunters did not find the deer so they think the deer decreased, but actually it is not the truth.
  Secondly, there is not any evidence to support the conclusion that recent global warming trends that makes the ice melt in Arctic. We don not have any information about who drawn the conclusion that global warming trends. So we can't put this region and Arctic in the same situation because maybe the weather and the meteorology are totally different from the two place- that is, the related research should be carried out in Arctic to make it clear whether it became warmer or not in Arctic.
Thirdly, even though the deer population is declining, it is not only because the deer are unable to follow their age-old migration patterns across the frozen sea. For example, the flavor of plants which the deer feed changed with the environment changed; they cannot be adapted to the new taste and didn't find new plants they like.
To sum up, the conclusion lack of credibility. Regardless of who the author is, he or she has overlooked or chosen to ignore many aspects of his or her conclusion. To strengthen the conclusion, the author should give more evidences above-mentioned possibilities. The author should do deeply survey about whether the deer population are declining and unable to follow their age-old migration patterns across the frozen see.

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