OG第73题（Fast cycle time那篇）

OG73 这道题目是用了一个逆否命题做了假设（在前提中有not unless
not A unless B=A-->B 要去掉瓶颈的话必然所有的东西就没错－－假设：所有的错误都会体现在瓶颈上  逆否：有错一定有瓶颈）。
可是我记得一般的假设题不都是架桥么，那这题怎么是这种办法，请大家给说说吧
另外，表达对前提的假设（presupposition）和咱们一般的假设有什么不同呢？

"Fast cycle time" is a strategy of designing a manufacturing organization to eliminate bottlenecks and delays in production. Not only does it speed up production, but it also assures quality. The reason is that the bottlenecks and delays cannot be eliminated unless all work is done right the first time.
The claim about quality made above rests on a questionable presupposition that
(A)any flaw in work on a product would cause a bottleneck or delay and so would be prevented from occurring on a "fast cycle" production line
(B) the strategy of "fast cycle time" would require fundamental rethinking of product design
(C) the primary goal of the organization is to produce a product of unexcelled quality, rather than to generate profits for stockholders
(D) "fast cycle time" could be achieved by shaving time off each of the component processes in production cycle
(E) "fast cycle time" is a concept in business strategy that has not yet been put into practice in a factory
答案：A