By Chris Ryan

We all know that the GMAT is a computer adaptive test, and computer adaptive tests give us questions based on the difficulty level that we earn as we take the test. How do the test writers at ACT (the organization that writes the GMAT; it used to be ETS, but ETS lost the contract to ACT 4-5 years ago; GMAC manages the algorithm and owns the test) determine which questions are harder than others? Read more

After our article on how to read a Critical Reasoning problem, I received a request for a similar article addressing Sentence Correction (SC). So, here you go! We’re going to address what we should do on any and every sentence correction question, regardless of the particular grammar rules tested in that problem.
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Application season is starting to heat up again! For those of you just getting started, here’s an overview of “what’s what” with the GMAT.

What Is The GMAT?

The Graduate Management Admissions Test is a standardized test that many English-speaking business schools require applicants to take. The test is called a CAT, or Computer Adaptive Test, both because it is administered on a computer and because the test actually changes based upon how we answer the questions. The computer chooses what test questions to give us based upon our performance up until that point in the test. In a sense, we all take a different test, because the specific mix of questions any one person sees is based on that person’s performance during the test.

To register for the test or learn more information straight from the testwriters, go to www.mba.com.

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On our forums, there’s been a recent spate of posts in which well-meaning users have posted official problems from GMATPrep—usually sentence correction problems—and then questioned or decried the construction of the correct answer choices.

“Is X really allowed? Isn’t it supposed to be Y?”

Some of these posters have actually gone to the trouble of looking up the disputed constructions in sundry reference works, including dictionaries and style guides, to try to find ammunition with which to attack the officially correct answer.

Never forget the following iron law:
On official problems, CORRECT ANSWERS ARE CORRECT, in every possible way.

This fact may sound obvious, but many students don’t realize its full consequences: namely, that every grammatical construction found in a correct answer to an official SC problem is officially valid, that every idiomatic expression in such an answer is correct, and that every word choice in such an answer is appropriate.
ALL of them.

This is an inviolable fact. Remember that the GMAT is a dictatorship, a consensus of one: only GMAC ultimately makes the decisions about which grammatical and idiomatic constructions are acceptable and which aren’t. We’re all playing on GMAC’s playground, and GMAC makes the rules.

What this means for you, the student, is that it’s a complete waste of time for you to question any official answer to a problem published by GMAC. Indeed, the only appropriate response to a correct answer that you find surprising, illogical, or “ugly” is this:
“Wow, that’s unusual. I guess I’ll have to recalibrate the way I think about that, because now I know I can do _____.”
Again, this is the ONLY way to respond to surprising constructions, solutions, and so on in officially correct answers. If you respond by questioning or doubting the validity of such answers, or, worse yet, actively trying to dispute that validity, then you are at best sidelining your studies with needless detours, and at worst confusing yourself.

On official problems, correct answers are correct.
That’s it.

There may be answers that you don’t like—I, for one, have been positively disgusted by a few of the officially correct SC answers I’ve seen—but you’ve got to learn to play by GMAC’s rules.

This is the latest in a series of How To Analyze articles that began with the general How To Analyze A Practice Problem article (click to read the original article). In this installment, we’re going to analyze a specific Sentence Correction question. Try it now (1 minute, 15 seconds):

Research has shown that when speaking, individuals who have been blind from birth and have thus never seen anyone gesture nonetheless make hand motions just as frequently and in the same way as sighted people do, and that they will gesture even when conversing with another blind person.

A) have thus never seen anyone gesture nonetheless make hand motions just as frequently and in the same way as sighted people do, and that

B) have thus never seen anyone gesture but nonetheless make hand motions just as frequently and in the same way that sighted people do, and

C) have thus never seen anyone gesture, that they nonetheless make hand motions just as frequently and in the same way as sighted people do, and

D) thus they have never seen anyone gesture, but nonetheless they make hand motions just as frequently and in the same way that sighted people do, and that

E) thus they have never seen anyone gesture nonetheless make hand motions just as frequently and in the same way that sighted people do, and

After trying the problem, checking the answer, and reading and understanding the solution, I try to answer these questions:

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