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NO17
.The following appeared in a letter to the editor of the Walnut Grove
town newspaper.
"Walnut Grove's town council has advocated switching from EZ Disposal
(which has had the contract for trash collection services in Walnut Grove
for the past ten years) to ABC Waste, because EZ recently raised its
monthly fee from $2,000 to $2,500 a month, whereas ABC's fee is still
$2,000. But the town council is mistaken; we should continue using EZ. EZ
collects trash twice a week, while ABC collects only once. Moreover,
EZ-which, like ABC, currently has a fleet of 20 trucks-has ordered
additional trucks. Finally, EZ provides exceptional service: 80 percent of
respondents to last year's town survey agreed that they were 'satisfied'
with EZ's performance."
正文
Only grounded on a series of uncertain causation and dubious evidence, the author educes a conclusion that Walnut Grove's town should continue using EZ, not ABC. To attest the conclusion, the author points out evidence that EZ collects trash twice a week, while ABC collects only once. In addition the author sets the result of last year's town survey of 80 percent of respondents were 'satisfied' with EZ's performance. Furthermore, the author asserts that EZ -which, like ABC, currently has a fleet of 20 trucks-has ordered additional trucks. However, this alone neither forms a logical argument for the conclusion nor provides cogent help for making the argument tenable. In my view, three logistic problems exist in this argument.
First of all, the author points out that EZ collects trash twice a week, while ABC collects one. ABC's alternative may consider that trash collected one time is enough. The author does not provide enough evidence to prove that there are large numbers of trash have to collect twice a week. On the contrary, this is may be why EZ recently raised its monthly fee from $2,000 to $2,500. In addition, Walnut Grove had the contract for trash collection services for the past ten years, this induce that they do not know ABC. And the author do not supply adequate evidence to support that ABC's collect trash method can not fit Walunt Grove's need. Therefore, just by collect trash times in a week to choose collect trash firm is not wise.
Secondly, the author sets the result of last year's town survey that 80% of respondents felt content with EZ's serves. To this argument, there are several problems. First, the number of person join in the survey is not large. This may not inquiry the persons who are not satisfied with EZ. Second, the people attend the survey is not representational. Because the survey is surveyed last year. May be some people want to change firm this year. Last the people attend the survey does not use ABC's serves at all. The reasons mentioned front, the author does not give enough information to show the Walnut Grove persons' thought. So the survey surveyed last year can not become causations to choose collect trash firm.
Finally, the author asserts that EZ has order more trucks on the basement of 20 trucks. Although EZ wants to buy trucks, no evidence to say these new trucks which will use to collect trash. Maybe EZ want to exploit new realm. Even these new trucks would use to collect trash, no evidence to prove EZ need more trucks only for Walnut Grove, not other towns. Thus more 20 trucks also can not judge which one to be selected. |
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