sayantanc2k
the same rule has been ignored in other examples seen on GMAT
...which means it's not a rule.
A "rule", by definition, is followed consistently. If there are exceptions, those exceptions can be concretely enumerated and are also consistent.
An idea that works
most of the time, but that sometimes randomly fails under the same circumstances, is not a rule—it's a guessing method.
The real crux of the issue here is that the OG answer explanations for SC problems just aren't very good. Those explanations—which were very obviously not written by the authors of the problems—often miss major issues entirely, and occasionally they say things that are not true at all.
The key to the answer choice currently under discussion is a perfect example of the poor quality of the explanations. It contains a fake "rule" that is not actually a valid rule, while entirely failing to mention the fact that the simple past can NEVER work with
Since xxxxx (which not only
IS a valid rule, but in fact is tested regularly).
This realization is VERY important.
The problems are NOT 'inconsistent' and DO NOT have 'gray areas'. It's the EXPLANATIONS / KEYS that are inconsistent and of dodgy quality. Anyone who doesn't make this pair of realizations is at risk of fundamentally misunderstanding what this exam is all about.
Quote:
There are indeed some gray areas (as this one), and during the test, if a candidate faces a question that falls in such a gray area, he / she must judicioulsly decide whether he / she has to apply the rule or ignore it.
If this statement were true, the GMAT would be unfit for purpose and pretty much worthless in general, and no serious graduate program would use it in admissions.
Literally the
entire point of standardized tests is that they DO NOT have 'gray areas' of this sort.
Moreover, if you're making this statement, that means you're actually placing more trust in the answer keys than in the problems themselves. (Think about it for a sec. The issue here is a conflict between the problems and the keys—so, either the problems are bad or the keys are bad.)
The statements you wrote here assume that the problems are bad, whereas the keys are just fine. That's the worst inversion of priorities imaginable here.
The PROBLEMS on this test are THE top priority. Nothing else about this test is anywhere near as important as the integrity of the problems—which are meticulously crafted, are put through many rounds of editing, feature honestly astounding levels of consistency and due diligence, and are NEVER misleading/disingenuous 'trick questions'.
The OG answer explanations, by contrast, are slapdash, incomplete, and clearly the work product of authors who are
much less capable, knowledgeable, and punctilious than the problem writers.
The answer keys are so unimportant that they legitimately might be the absolute
LAST-place priority out of everything GMAC does or produces.