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61 39’’
Background info: a men’s sock company plan to increase its market shares.
Fact1: the size of customer pool keeps steady these years.
Fact2: presumably each male customer buys 12 pairs of socks every year.
Weaken: most of male people tend to buy new pairs of socks at the beginning of each year they will wear in the whole year.
62 25’’
Premise: previous studies show eating chocolate is harmful to people’s heart, increasing the probability they will get heart attack.
Evidence: new studies indicate that chocolate will not harm people’s heart.
Conclusion: once the new evidence is known to people, the chocolate industry will embrace an increasing in the consuming of its products.
Assumption: consumers know and really care about the studies.
63 38’’
Evidence: climate become warmer and dryer at the end of Pleistocene period
Conclusion: then Megafauna die out but small mammalian species survive.
Basis: Megafauna, other than small mammalian, prefer cold and wet climate.
64 41’’
Premise1: bonus at DSR industries awarded for profits exceeding 10% return on stockholders’ investment.
Premise2: High profits= High bonus.
Conclusion: bonus is lower in economic recession than in the peak profits at DSR.
Assumption: in the depression times, DSR could seldom sales its products and still cost fixed costs. = (the profit in DSR is so low that staffs receive little bonus)
65 70’’
Evidence: 1. trucking companies pay only a portion of highway maintenance costs and no property tax. 2. Railways spend billions per year on maintaining and upgrading.
Argument: government should lower the railroad companies’ property taxes.
Points: 1.based on a false analogy. The argument only compares some characteristics of railway transportation to the characteristics of highway transportation. The two industries are not that comparable. Though highway transportation is more expensive than railway transit, highway is more convenient and easier to access to every corner of the country. Railway, on the other hand, …
2. Gratuitous assumption, each trucking company only pay a portion of highway maintenance costs, but the aggregation of all the payments by trucking company may cover the maintenance cost, what is more, highway management agency can charge the transportation fee in a long period, thus it can offset or even surpass its maintaining cost.
3. The proposed measurement on railway might not as successful as the policy maker’s expectation. Increasing in rail traffic would not require building new lines but might increase the burden of existing railway, and excessive transportation might decrease the efficiency and shorten the durable years of railway. |
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