- 最后登录
- 2011-12-5
- 在线时间
- 122 小时
- 寄托币
- 525
- 声望
- 18
- 注册时间
- 2010-3-16
- 阅读权限
- 25
- 帖子
- 3
- 精华
- 0
- 积分
- 435
- UID
- 2781482

- 声望
- 18
- 寄托币
- 525
- 注册时间
- 2010-3-16
- 精华
- 0
- 帖子
- 3
|
Reports form the hunters ~~~ decline of deer
前提
鹿的数目降低
加上 global warming trends that have caused the sea ice to melt 背景 ~~~~ 鹿的age-old migration patterns 遭破坏
推出
鹿的数目降低是因为不能走age-old migration patterns,
前提,猎人的证词没有依据,
背景
环境的温度升温
没有证据证明
当地的温度变化,冰融化,路线改变。
即使这两者都成立,也存在别的因素使鹿的数目降低
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: 484
TIME: 01:49:55
DATE: 2010/5/31 21:54:58
Grounding on the editorial in a wildlife journal, the speaker makes an assertion that the decline in arctic deer populations results from deer being unable to follow their age-old migration patterns across the frozen sea, based on the reports from local hunters, the decline number of deer and the recent global warming trends that have caused the sea ice to melt. However, after taking a second attentively thought, we can easily make a judgment that the speaker's conclusion without overall consideration is illogical and lakes the sufficient statistics to support, which just depends on unilateral accordance.
In the first place, the speaker, in order to prove the decline population of deer in Canada's arctic region, provides reports from local hunters. However, these reports seeming to be credible, in fact, lack evidences to support. In this article, there is no reliable explanation how the local hunters make a decision that the number of deer comes down. So, we can assume that maybe arctic deer changing the line of their age-old migration patterns leads to hunter coming across fewer deer, rather than the decline of the population. Therefore, the reports about the decline in arcitc deer populations are not highly reliable for it fails to provide any statistics to support the hunters words. Thus, without better evidence, the article hardly convinces me of the decline of deer population.
In the second place, the speaker considers that the global warming trends having caused the see ice to melt makes great impact on the deer's age-old migration patterns, which leads to the decline of the deer populations. However, in the article, we hardly find any sufficient scientific statistic proved to indicate the increase of temperature in Canada's arctic region. Thereby, we have no credible accordance to assert the ice in Canada's arctic region to melt, causing the Arctic deer's age-old migration patterns to be destroyed. So, the speaker could not make such incredible conclusion based on insufficient data, which hardly assures me.
Even if the decline of deer indeed happens and the temperature in Canada's arctic region rise, it is still lacking strong evidence to prove the decline resulting from the recent global warming trends, which hold by the speaker to support his conclusion.
For there are existing many potential possibilities, such as the excessive hunts leading the number of deer to decrease magnificently , or maybe a serious disease breaking out in recent time between arctic deer, and so forth. In short, lacking evidence of a sufficiently representative sample, the author cannot justifiably rely on the study to draw any conclusion whatsoever.
Based on the above analyze, we clearly realize the irrationality of speaker's assertion. In order to establish a strong conclusion, speaker should provide more statistics to prove the truth of decline of deer, and list sufficient scientific reports to illustrate the influence from the global warming trends to the population decline in arctic deer. |
|