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题库 / GMATAdvanced-CR-25
Since 1978 when the copyright law was changed, books that are less than fifty years old must not be photocopied without the publisher’s permission. Thus, any book that has been photocopied since 1978 without the publisher’s permission must be at least fifty years old.
The reasoning above exhibits a flaw similar to one in which of the following?
Any member of the solar system must be either a planet or a moon, so if an asteroid is neither a planet nor a moon, it must not be a member of the solar system.
Anyone who rides a city bus must buy a bus pass, and since Demetrios has a bus pass, he must be riding on a city bus.
A driver who turns right must signal, so any driver who did not signal must not have turned right.
Anyone who legally crosses a national boundary must have a passport; thus anyone who does not have a passport cannot legally cross a national boundary.
Any wage earner residing in the state must pay state taxes, so since Blodwen pays state taxes, she must be resident in the state.
原文说书少于50年，没有许可不能被copy。所以被copy的还没有许可的一定至少50年了。
Flaw：错误假设规则一定会被遵守
B：说坐车一定会买票，所以买票的人一定会坐车。这把遵守规则当做前提了，如果是坐车的一定买票了，则就是那个flaw了。
C：右转一定会打灯，所以没打灯的一定不是右转。有flaw，不一定右转的人都会打灯。
D：人合法过境一定要有护照，所以人没有护照不能过境，没有flaw
E：任何境内居住有收入的人都要纳税，(flaw就是不一定这样的人就会纳税，所以没有纳税的人不一定就是没收入的人）如果说没有纳税的人一定是没有收入的就可以选了
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