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When performing thorough examinations of patients with histories of he

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New post 07 Dec 2019, 21:35
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Project SC Butler: Day 201: Sentence Correction (SC2)


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When performing thorough examinations of patients with histories of heart disease, physicians sometimes check the flow of blood.

A) physicians sometimes check the flow of blood

B) physicians sometimes measure blood flow

C) physicians will sometimes check the blood flow

D) the flow of blood is sometimes measured by physicians

E) blood flow is measured and checked by physicians

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New post 07 Dec 2019, 21:36
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Project SC Butler: Day 201: Sentence Correction (SC2)



• HIGHLIGHTS

Skip this part if you want only the PROCESS OF ELIMINATION, below, next bullet point.

"Check"? "Measure"? Which one? (Options A and B)

CHOOSE THE BETTER VOCABULARY WORD
-- sometimes GMAT uses different but synonymous words in order to distract.
-- sometimes, though, one word is better than the other.

Best case scenario: think of secondary meanings
In this case, one word is better.
-- to check does means to inspect.
But it also means to stop or hinder.
Correct: Quarantines usually check the spread of disease.

You could even think about the colloquial expression, "Check yourself," which means, "Stop yourself."

Although we understand the sentence with either measure or check, it would be better to use the word measure than to use the word check.
We don't want to imply that heart doctors sometimes stop blood from flowing.
Measure never means stop.
Avoid any chance of ambiguity.

Second best case scenario: compare the specificity and suitability of each word.

(1) Realize that the word check is less specific than measure. Do so by thinking of sentences.
-- Please check the soup on the stove. [Is it burning? Is it curdling? Is it doing something horrible?]
-- Please check the front door. [Is it locked? Is the noise that I hear someone knocking on the door? Is the door closed?]
-- Please check your temperature. [Pleasure measure your temperature.]
-- Please check with the concierge about our limousine service. [Go ask the concierge a question.]

Try to make sentences to get a more specific impression of meaning.
In Quant, we test small cases to find patterns for impossibly huge cases.
Try the same technique in SC.
Start thinking of sentences, which help us to get a better "feel" for the word.

ALTERNATIVELY
(2) realize that the word measure fits better with blood flow.
-- liquids flow at a rate.
-- to find out more about a rate, we measure it. Yes, we can "check" the rate. But the more precise and fitting word is measure.

Verb tense? Simple present? Simple future?

STATEMENTS THAT DESCRIBE GENERAL TRUTHS OR HABITS DO NOT USE "WILL" (Option C)
This sentence is a zero conditional: IF clause in simple present tense, THEN clause in simple present tense

The word "when" in the non-underlined portion locks us into a "zero conditional"
Only zero conditionals can use when in place of if.
When [if] water is heated, its volume expands.

(1) "Zero conditionals" express habits, general truths, scientific facts, and the like
If X happens, then Y happens.
If THIS thing happens, then THAT thing happens. (Not "will happen.")

X = THIS thing = WHEN or IF physicians perform thorough examinations of patients with histories of heart disease
Y = THAT thing = [then] sometimes those physicians measure blood flow

The author is not predicting. The word "when" tells us that the writer is describing a general truth or habit.
When we describe general truths or habitual actions, we can and often do use the word "when" rather than the word "if."

These three sentences are all zero conditionals. "When" is fine.
Correct: If it rains, sometimes the porch area gets wet.
Correct: When it rains, sometimes the porch area gets wet.
Correct: The porch area sometimes gets wet when it rains.

(2) Type 1 conditionals, by contrast, are often predictions or warnings.
Type 1: IF simple present, THEN simple future
Type 1 conditionals might be highly likely, but the outcome is not certain.
Some speculation exists.
We cannot use when in a Type 1 conditional.

This author is not speculating. The author is describing what happens (on occasion, but nonetheless always on occasion) in a certain context.
The verb "will" is not correct.

• PROCESS OF ELIMINATION

When performing thorough examinations of patients with histories of heart disease, physicians sometimes check the flow of blood.

Quote:
A) physicians sometimes check the flow of blood

• The word "check" can mean "stop."
• TENTATIVELY KEEP, but look for a better option

Quote:
B) physicians sometimes measure blood flow

• the word "measure" is better than check. The word check could mean "stop."
KEEP (and eliminate A)

Quote:
C) physicians will sometimes check the blood flow

• The word "will" is incorrect. Compare to (B) in which no verb shift happens.
-- Does any good reason exist to shift verb tenses?
-- Is this writer talking about something that happens routinely or is a habit of the physicians?
If so, then simple present tense about what doctors DO (not "will do") is correct.

• The word "will" is incorrect because it suggests a prediction, not a statement about habit.
-- IF simple present, THEN simple future is used in Type 1 conditionals
-- we are dealing with a Zero Conditional
We are locked into a zero conditional because the word "when" is in the underlined part. "When" can be used rather than "if" only with Zero Conditionals
We need simple present (as in B), not simple future.
• This Type 1 (IF simple, THEN future), in other words, is not allowed.
Eliminate C

Quote:
D) the flow of blood is sometimes measured by physicians

• modifier error: the flow of blood is not performing a thorough examination of anyone.
Eliminate D

Quote:
E) blood flow is measured and checked by physicians.

• blood flow is not performing examinations
Eliminate E

The best answer is B

For more on conditionals, see my post here.

COMMENTS

I don't know whether GMAC would ask about the two words check and measure.
In this case (and in others on the GMAT), we have a chance to leave no room for ambiguity, so:
Leave no room for ambiguity. mykrasovski , I hope that answers your question.
GMAC really dislikes ambiguity.

But you all need not worry. Your answers are clear. Nice work. Kudos to all.
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When performing thorough examinations of patients with histories of he  [#permalink]

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New post 08 Dec 2019, 02:17
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generis wrote:

Project SC Butler: Day 201: Sentence Correction (SC2)


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When performing thorough examinations of patients with histories of heart disease, physicians sometimes check the flow of blood.


'When performing thorough examinations of patients with histories of heart disease' -> Needs a doer after comma
Only A , B and C have physicians. They're the only contenders for a correct answer.

Quote:
A) physicians sometimes check the flow of blood


Quote:
B) physicians sometimes measure blood flow

Correct . Measure, a verb,action is better than check

Quote:
C) physicians will sometimes check the blood flow

Wrong Tense.

Quote:
D) the flow of blood is sometimes measured by physicians



Quote:
E) blood flow is measured and checked by physicians

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Thanks,
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When performing thorough examinations of patients with histories of he  [#permalink]

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New post 08 Dec 2019, 02:33
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When performing thorough examinations of patients with histories of heart disease, physicians sometimes check the flow of blood.

Meaning: When performing thorough examinations of patients with histories of heart disease, physicians sometimes measure blood flow.

The opening phrase is an adjectival phrase and it must modify a noun that is capable of performing thorough examinations. Based on this premise, we can eliminate D and E since neither blood flow nor the flow of blood is capable of performing thorough examinations of patients.

A, B, and C are quite dicey. But focusing on the meaning of the sentence, we can clearly see that we have no idea the specific patient whose blood flow is measured or checked by the physicians. Yes, we know patients with histories of heart disease, but there are many patients who fall into that category. So, we can't be definite about the patient. Hence, the use of the definite article is not appropriate for blood flow [of patients with histories of heart disease]. Maybe if the non-underlined were to precede patients with the definite article the, I would be confused about how to choose between A, B, and C. Based on this understanding, we can eliminate A and C for the wrongful use of the definite article to modify flow of blood and blood flow respectively in patients with histories of heart disease.

We are left with B as the best answer. This is why I chose B ahead of A and C. I'm looking forward to the OE from Sir generis

A) When performing thorough examinations of patients with histories of heart disease, physicians sometimes check the flow of blood

B) When performing thorough examinations of patients with histories of heart disease, physicians sometimes measure blood flow

C) When performing thorough examinations of patients with histories of heart disease, physicians will sometimes check the blood flow

D) When performing thorough examinations of patients with histories of heart disease, the flow of blood is sometimes measured by physicians

E) When performing thorough examinations of patients with histories of heart disease, blood flow is measured and checked by physicians
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Re: When performing thorough examinations of patients with histories of he  [#permalink]

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New post 08 Dec 2019, 10:46
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Quote:
When performing thorough examinations of patients with histories of heart disease, physicians sometimes check the flow of blood.


Quick read through shows that a tiny portion of the sentence is underlined and we have a pretty big modifier in the beginning of the sentence. The modifier has to logically connect to someone (doctors) who performs the action of measuring/checking. So, options (D) and (E) are out right away.

A) physicians sometimes check the flow of blood

B) physicians sometimes measure blood flow

C) physicians will sometimes check the blood flow
Why do we have Future tense here? We discuss a situation that generally occurs, so Present tense is preferred.

D) the flow of blood is sometimes measured by physicians
See explanation above.

E) blood flow is measured and checked by physicians
See explanation above.

Honestly, it is very hard to choose between (A) and (B). I do not recall seeing a similar GMAT question... Will be happy to be wrong!!! I was stuck, and decided to pick my favorite letter. Quick search in google shows that doctors measure/check "blood flow", so apparently this is a commonly accepted term in medicine. Look forward to OE.
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Re: When performing thorough examinations of patients with histories of he  [#permalink]

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New post 08 Dec 2019, 10:59
1
When performing thorough examinations of patients with histories of heart disease, physicians sometimes check the flow of blood.

A) physicians sometimes check the flow of blood

B) physicians sometimes measure blood flow

C) physicians will sometimes check the blood flow

D) the flow of blood is sometimes measured by physicians

E) blood flow is measured and checked by physicians

Physicians perform the task described by the clause introduced in the beginning, so we need the subject after the comma. We usually say 'blood flow', not' flow of blood'. For C, there is no need for a simple future tense. If the original sentence was written as 'check the blood flow', I would've chosen A. But here IMHO B is the OA.
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Re: When performing thorough examinations of patients with histories of he  [#permalink]

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New post 09 Dec 2019, 11:24
1
generis wrote:

Project SC Butler: Day 201: Sentence Correction (SC2)


For SC butler Questions Click Here



When performing thorough examinations of patients with histories of heart disease, physicians sometimes check the flow of blood.

A) physicians sometimes check the flow of blood
B) physicians sometimes measure blood flow
C) physicians will sometimes check the blood flow
D) the flow of blood is sometimes measured by physicians
E) blood flow is measured and checked by physicians


MEANING: When performing examinations of some patients, physicians [p] sometimes measure [p] blood flow.
NOTICE: Who is performing exams? Physicians; Do they measure or check the blood flow? They measure.

A) "check the flow of blood" less concise and unintended;
C) "check the blood flow" less concise;
D) "the flow of blood examines" nonsense;
E) "blood flow…examines" nonsense.

Ans (B)
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Re: When performing thorough examinations of patients with histories of he  [#permalink]

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New post 10 Dec 2019, 03:20
The official explanation is here.
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Re: When performing thorough examinations of patients with histories of he  [#permalink]

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New post 10 Dec 2019, 09:34
Hi generis, thanks for explaining how to approach the difference between (A) and (B). Sadly, I did not know that the word check has extra meanings... So, while I constantly try to improve the vocabulary, I hope such questions won't appear at the real test and there will be other things to look at and use for elimination. Thank you!
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New post 11 Dec 2019, 01:28
mykrasovski wrote:
Hi generis, thanks for explaining how to approach the difference between (A) and (B). Sadly, I did not know that the word check has extra meanings... So, while I constantly try to improve the vocabulary, I hope such questions won't appear at the real test and there will be other things to look at and use for elimination. Thank you!

mykrasovski , if your point is that this question is not official and not as good as an official question would be, I agree with you.
I think you know that finding good questions for this project is really hard.

My invitation to all aspirants to bring a question to SC Butler and to be a guest poster still stands. Posted here.

Non-official questions will never be as good for practice as official questions are.

No, I do not think that GMAC will put you in exactly this kind of position.
I do know that GMAC will put you in a position in which you will need every bit of intuition and analytical skill that you possess.
I have every confidence in you: I'm sure that you will either find some "wiggle room" or guess and move on.
(Can you imagine being a baseball player? An incredible batting average—as in, hit the ball with the stick—is just above 30%. A success rate of 40% is almost unheard of. :lol: )

I amended the OE slightly and explained a different way to choose between A and B.
You don't need to know the secondary definition of "check."

Ultimately, blood is a fluid. Fluids such as blood flow at a rate.
Rates are numeric. We measure a rate.

Suppose that we want to find the speed of a boat that travels upstream against current and downstream with current.
Would we ask, "Professor, how do we check the speed of the boat?"
Ouch. No, we would ask, "Professor, how do we measure the speed of the boat?"

Yes, we can "check" a rate. The construction is not wrong. It is not as formal as "measure," but the construction is not wrong.
"Not wrong" does not equal "better."
check a rate is not as precise as measure a rate.
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Re: When performing thorough examinations of patients with histories of he  [#permalink]

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New post 11 Dec 2019, 07:03
Hi generis, thank you for your patience and additional explanation.

I completely agree that it is very hard to find / build good non-official GMAT questions. And this is why, I presume and hope, many people highly appreciate your SC Butler initiative. I hope that after I am done with the test I will be able to contribute to the community more than I do now. Let's see.

Most definitely one needs to be as creative as possible (and quick) while solving questions during the test. So, what we learn here will serve us well once we face the real beast.

Thanks again and have a wonderful day!
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Re: When performing thorough examinations of patients with histories of he   [#permalink] 11 Dec 2019, 07:03
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