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GMAT CR里有太多考察“充分必要关系”题了,以下选逻辑小分队的题举例一题和我的解答。
The rate of new drug development in Nation X has changed little over the last decade, even though, over the same period, the cost of developing a new drug has increased significantly. The patent system in Nation X, because it insulates drug developers from various market pressures, can be expected to produce this sort of cost explosion. Such patent protection allows firms to sell a drug at several times its free-market price for many years, and thus pharmaceutical companies have no incentive to minimize research costs, greatly limiting the duration of these patent protections would promote more cost-efficient new development.
The proposal above relies on which of the following assumptions?
A. In Nation X, current patent protections create impediments to the development of new drugs.
B. If the prices of newly developed drugs were subject to market pressures sooner, companies would have a greater incentive to minimize research costs.
C. If the prices of newly developed drugs were subject to market pressures sooner, pharmaceutical companies would have a greater incentive to increase the number of drugs they develop.
D. Nation X's current patent system causes some pharmaceutical companies to exaggerate their research costs to consumers.
E. If the prices of newly developed drugs were subject to market pressures sooner, pharmaceutical companies would have a greater incentive to improve the effectiveness of new drugs.
此题为“充分必要关系”题。
绕来绕去说了一大段,其实就是个很简单的逻辑陷阱:Years price protection-->非incentive to minimize research costs,结论:非Years price protection-->cost down.
现在:Years price protection是非incentive to minimize research costs的充分条件,而不是充要条件啊!充分条件的意思就是说:有Years price protection,则有非incentive to minimize research costs,但是不是非Years price protection,则是不是一定incentive to minimize research costs我不知道啊!
结论成立的Assumption就是:Year price protection是非incentive to minimize research cost的必要条件,即 非Year price protection-->incentive to minimize research cost.
btw, 我2016年底就750分手了,现在MBA毕业都3年了 |
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