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In this argument, the author concludes that people of particular risk for the flu should avoid prolonged exposure to the sun. To justify this conclusion, the author cites that the six worst worldwide flu epidemics happened in the years with heavy sunsport activity in the last 300 years. Close scrutiny of these facts, however, reveals that none of them lends credible support to the conclusion.
To begin with, the author fails to mention the situation of the flu epidemic in the other years with heavy sunspot activity. It is entirely possible no flu epidemic occured when there existed a heavy sunspot activity. Then the cause and effect relation between the heavy sunspot activity and the big flu epidemic is invalid. Besides, the author fails to account for the sunspot activity when there was a flu epidemic, even not the worst, but severe enough to be taken into account. Perhaps in the year when the sunsport activity was inactive, still, the flu epidemic ocurred. Thus, it can not be proved that flu epidemic will occur only in the years with heavy sunspot activity.
(感觉这段的逻辑有点模糊,在最后一句话上得到最大体现,论者并没有说flu epidemic will occur only in the years with heavy sunspot activity,这句作为全段的结尾,是一种小结,突出体现了攻击方向的错误.LZ的想法是很好的,去质疑other years with heavy sunspot activity是否同样有flu epidemic,我觉得可以用这点去攻击论者的cause and effect relation between the heavy sunspot activity and the big flu epidemic,论证他的这个 relation有严重的问题,导致最后的论点不convincing.)
Furthermore, the author fails to give any information for the other possibilities for the flu epidemic. Perhaps in those six years with the worst worldwide flu epidemic, there was a worldwide war or people were frequently emigrated and immigrated. Therefore, the flu would be easily carried from one part of the world to another, finally bringing a disaster. Without ruling out these possible causes, I am not convinced that the heavy activity of the sunspot was the main factor of the worldwide flu epidemic.
Even assuming the heavay activity of the sunspot has a profound impact on the flu epidemic, the available medical records are still inadequate to me. The records only cover a time in the past 300 years, while 300-year time can almost be negelected compared with the human medical history. Even if the older records were inavailable, the six worst worldwide flu epidemic is too little as a sample to be valid. The smaller is the sample, the less reliable is the conclusion.
To sum up, the argument is logically flawed and therefore unpersuasive as it stands. To make the argument more convincing, the author should provide more specific evidence to prove that it is the heavy sunspot activity, making the earth receive remarkably more solar energy, that leads to the worldwide flu epidemic. To better assess the argument, I would need to know more broad and detailed medic history records about the flu epidemic.
另外,可以质疑论者提出的方法是否能够达到作者以为会有的effect.用让步的语气,even if 论者关于activity of the sunspot 和 flu epidemic的关心是正确的,采取作者提的方法avoid prolonged exposure to the Sun是否能够起到一定的防范flu的作用;方法是否可行?比如需要长期在阳光下进行户外工作的人.
[ 本帖最后由 ibfly 于 2006-2-3 21:42 编辑 ] |
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