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The following appeared in an editorial in the Mason City newspaper.
'At present, Mason City residents seldom use the nearby Mason River for any kind of recreational activity, even though surveys of the region's residents consistently rank water sports (swimming, fishing, and boating) as a favorite form of recreation. Since there have been complaints about the quality of the water in the river, residents must be avoiding the river because they think that it is not clean enough. But that situation is about to change: the agency responsible for rivers in our region has announced plans to clean up Mason River. Therefore, recreational use of the river is likely to increase, so the Mason City council will need to increase its budget for improvements to the publicly owned lands along the Mason River.'
1 调查的可靠性
2 council决定的合理性
In this argument, concerning the topic of the recreational function of the Mason River, the arguer provides some evidences and concludes that the Mason City council should increase its budget for improvement to the lands along the Mason River. Trough analyzing this argument carefully, I consider it is logically unconvincing in several respects, such as unsubstantiated evidences, problematic survey, and hasty conclusion, as discussed below.
For one thing, the arguer fails to provide more concrete information to increase the credibility of the survey. First, the identities of the conductors of the survey are all unknown to us. Without these information we could not evaluate the authority of this survey. Second, the arguer should provide some valid information concerning the participants, such as age , gender, and occupation, because these information could improve the reliability of the survey. In short, in the absence of substantial data, the arguer could not conclude that residents in Mason City prefer water sports.
For another, the arguer fails to demonstrate that the council's decision of increasing the budget for improvements to the publicly owned lands along the Mason River is proper. First, no evidence in this argument indicates the residents in the Mason City have no places of recreation except the lands along the Mason River. Maybe there are some better recreational places residents could choose, and the project along the Mason River is redundant one. Second, the auger could not validate the lands along the Mason River is suitable to serve as places of recreation. Maybe nearby the river there are a hub of communication, and too much exhaust gas and noise of vehicles, obviously, in this case it is not proper for a place of recreation. Third, on the contrary, it is possible that there are already some recreational places along the Mason River. Consequently, lacking solid information which supports the decision of increasing the budget, the credibility of the conclusion is suspicious.
In sum, in this argument the arguer fails to demonstrate the legitimacy of the budget, and to strengthen the conclusion the arguer must show that residents in Mason City really rank water sports as a favourite form of recreation and that the project of improvements to the publicly owned lands along the Mason River is propose.
[ Last edited by staralways on 2005-8-5 at 03:00 ] |
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