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The following appeared in a newspaper article published in the country of Corpora.
'Twenty years ago, one half of all citizens in Corpora met the standards for adequate physical fitness as then defined by the national advisory board on physical fitness. Today, the board says that only one quarter of all citizens are adequately fit and suggests that spending too much time using computers may be the reason. But since overall fitness levels are highest in regions of Corpora where levels of computer ownership are also highest, it is clear that using computers has not made citizens less physically fit. Instead, as shown by this year's unusually low expenditures on fitness-related products and services, the recent decline in the economy is most likely the cause and fitness levels will improve when the economy does.'
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In this article, the arguer provides two conclusions. One is that using computers has no effect on people physically fit; the other one is that fitness levels would improve when the economy gets better. To support the two conclusions, the arguer mainly bases on a survey about the computer ownership in Corpora and the expenditures situation on fitness-related products. However, close scrutiny of this evidence; it is not difficult to find that the argument is severe on several grounds.
In the first place, the arguer fails to convince me that the use of computers would not cause people's physical problems. The survey in Corpora could not rule out this possibility because maybe in Corpora people do not spend too much time on computers although their levels of computer ownership are highest. It is also possible that in Corpora, people like to exercise so their healthy condition is good. If there is no relevant evidence, I could not accept the arguer's claim.
In the second place, whether the decline of economy causes the low expenditures on fitness-related products is open to doubt. Perhaps people do not like the taste of these products. Or perhaps they think that the fitness- related products are not as effective as they wish. It is also possible that the price of the products is so high that most of people could not afford them. So if the arguer could not rule out these possibilities, it is inappropriate to deduce his or her conclusion.
Last but not the least, even if grant that the economy condition is the reason for the recent low expenditures on fitness-related products. The arguer still hastily assumes that the fitness levels will improve with the better economy. Possibly, people do not prefer to spend their money on the fitness-related products. In this circumstance, even if the products are very good for people' health, we still could not necessarily get the arguer's conclusion.
To sum up, the arguer fails to convince us that his or her conclusions are reasonable. To bolster the conclusions, the arguer must provide more direct information about whether the economy condition reduces the expenditures on fitness-related products. To evaluate the conclusions, we must know other evidence about the condition of computer use in Corpora.
In this article, the arguer provides two conclusions. One is that using computers has no effect on people physically fit; the other one is that fitness levels would improve when the economy gets better. To support the two conclusions, the arguer mainly bases on a survey about the computer ownership in Corpora and the expenditures situation on fitness-related products. However, close scrutiny of this evidence; it is not difficult to find that the argument is severe on several grounds.
In the first place, the arguer fails to convince me that the use of computers would not cause people's physical problems. The survey in Corpora could not rule out this possibility because maybe in Corpora people do not spend too much time on computers although their levels of computer ownership are highest. It is also possible that in Corpora, people like to exercise so their healthy condition is good. If there is no relevant evidence, I could not accept the arguer's claim. (感觉范围有点大,我认为这个作者只是给出一个CORPORA的区域,没有理由把这个区域扩大)
In the second place, whether the decline of economy causes the low expenditures on fitness-related products is open to doubt. Perhaps people do not like the taste of these products. (WHAT????)Or perhaps they think that the fitness- related products are not as effective as they wish. It is also possible that the price of the products is so high that most of people could not afford them.(好像和经济有关系哦) So if the arguer could not rule out these possibilities, it is inappropriate to deduce his or her conclusion.
Last but not the least, even if grant that the economy condition is the reason for the recent low expenditures on fitness-related products. The arguer still hastily assumes that the fitness levels will improve with the better economy. Possibly, people do not prefer to spend their money on the fitness-related products. In this circumstance, even if the products are very good for people' health, we still could not necessarily get the arguer's conclusion.
To sum up, the arguer fails to convince us that his or her conclusions are reasonable. To bolster the conclusions, the arguer must provide more direct information about whether the economy condition reduces the expenditures on fitness-related products. To evaluate the conclusions, we must know other evidence about the condition of computer use in Corpora.