- 最后登录
- 2011-5-2
- 在线时间
- 5 小时
- 寄托币
- 7595
- 声望
- 1
- 注册时间
- 2005-10-20
- 阅读权限
- 40
- 帖子
- 64
- 精华
- 0
- 积分
- 7621
- UID
- 2150032
  
- 声望
- 1
- 寄托币
- 7595
- 注册时间
- 2005-10-20
- 精华
- 0
- 帖子
- 64
|
Arg 59:
The following appeared in an article in the health section of a newspaper.
"According to the available medical records, the six worst worldwide flu epidemics during the past 300 years occurred in 1729, 1830, 1918, 1957, 1968, and 1977. These were all years with heavy sunspot activity—that is, years when the Earth received significantly more solar energy than in normal years. People at particular risk for the flu should therefore avoid prolonged exposure to the Sun."
In this argument, the arguer concludes that people at particular risk for the flu should therefore avoid prolonged exposure to the Sun. To support the conclusion, the arguer provides the evidence that the six worst worldwide flu epidemics during the past 300 years occurred in 1729, 1830, 1918, 1957, 1968, and 1977 according to the available medical records. In addition, the arguer points out that these years were all with heavy sunspot activity, which means that the Earth received significantly more solar energy than in normal years. A careful examination reveals that the argument suffers from several fallacies.
In the first place, the arguer fails to establish the casual relationship between the flu and sunspot. The mere fact that the six worst worldwide flu epidemics during the past 300 years occurred in the years that were all with heavy sunspot activity is insufficient to support the assumption that the sunspot can result in the flu. This fact is provided according to the available medical records, so there might be many other years in which the flu occurred which ignored by the arguer. Moreover, what about other years in which there is sunspot activity? Possibly, the flu happened in the same time or did not, which is not inferred in the argument. Then it is not groundless for the arguer to suppose that there is the causal relationship between them.
In the second place, the arguer hastily concludes that people at particular risk for the flu should therefore avoid prolonged exposure to the Sun. Even the fact that the sunspot is the brief reason of the flu is credible, the suggestion probably is that they should take some measures to protect themselves properly during the years that have the sunspot, but not to avoid prolonged exposure to the Sun. Moreover, the arguer offered the fact that the years with heavy sunspot activity means that the Earth received significantly more solar energy than in normal years. There is no evidence to lend strong support to that the receiving of the energy of the Earth have relationship with the sunshine. Even so, what about the days without sunshine during the sunspot, if the people can expose themselves in the open air freely? Common sense tells us that there are many benefits of sunshine, the conclusion that people should avoid exposure to the Sun without any limit is misleading.
In addition, the arguer ignores other factors that might cause the flu. There is no concrete evidence about the six worst worldwide flues. Which countries suffered more seriously? What other events happen during the years? The arguer fails to rule out the possibility that some countries or areas did not suffer the flu or there were other infections that cause the flu. So the measure that the people should avoid to be influenced by the sunspot might not avoid the flu at all. In addition, the people at particular risk for the flu might be more easily get flu because the factors of themselves. For instance, the people are constitutionally weak; the infants; what’s more, the people with other serious diseases such as AIDS.
To sum up, the argument is undermined by various logical fallacies. To better support the argument, it is necessary for the arguer to provide more information and to warrant his or her assumptions.
(552 words, 61’)
[ 本帖最后由 acme 于 2006-4-9 19:35 编辑 ] |
|