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Bunuel
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IMO it should be D.
If all types of depression are incorrectly attributed to Post Partum depression, it calls into question that the rates have increased by a factor of 10 or have increased at all
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C is good.Saying that number increased because of a reason other than people actually falling sick.

I thought D was correct for a moment but 1970 was the dampner
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Bunuel
Senator: Between 1950 and present, the number of women diagnosed with postpartum depression each year in the country of Heranita has increased by a factor of ten. We must improve our systems for supporting women after childbirth to stem this increase in the number of new mothers experiencing postpartum depression.

Which of the following, if true, would most call the argument above into question?


A. The amount of spending on women’s health has increased since 1950.

B. Rates of postpartum depression are not included in official government statistics.

C. The minimum threshold of symptoms women experience before they can be diagnosed has increased since 1950.

D. Until 1970, most doctors were not specific in their diagnoses but instead grouped all types of depression together.

E. It is likely that cases of postpartum depression are underreported in Heranita.


Dear Bunuel ..
I think option D is supporting the argument , instead calling the argument into question .
Please provide the explanation if I am wrong . Thanks in advance !!
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I have a question with this stimulus, the question says "1950 and present" Am I to assume that 'present', on a GMAT CR question, refers to the date any test taker is reading the question especially since its the Senator talking... It doesn't seem definite From the stimulus if 'present'refers to before 1970 or today. That's why I dropped option D.
Am I to expect this level of ambiguity on CR questions?

Dear Bunuel, pls shed more light

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Bunuel
Senator: Between 1950 and present, the number of women diagnosed with postpartum depression each year in the country of Heranita has increased by a factor of ten. We must improve our systems for supporting women after childbirth to stem this increase in the number of new mothers experiencing postpartum depression.

Which of the following, if true, would most call the argument above into question?


A. The amount of spending on women’s health has increased since 1950.

B. Rates of postpartum depression are not included in official government statistics.

C. The minimum threshold of symptoms women experience before they can be diagnosed has increased since 1950.

D. Until 1970, most doctors were not specific in their diagnoses but instead grouped all types of depression together.

E. It is likely that cases of postpartum depression are underreported in Heranita.

VERITAS PREP OFFICIAL EXPLANATION:



Whenever you are asked for an answer choice that will weaken a given argument or conclusion, remember that you should first seek to understand the argument and then you should look to find the gap between the premises of the argument and its conclusion.

You are told here that since 1950 the number of women diagnosed with postpartum depression in Heranita has increased. Because of this, the advocate suggests that the country improve the women's health care system so that women do not have to experience the symptoms of postpartum depression. Already you should see that there are a few gaps here - what if women have symptoms but aren't diagnosed? What differentiates postpartum depression from regular depression?

Only (D) addresses one of those gaps. If cases of postpartum depression were once described under the general umbrella of "depression", then it is impossible to know if postpartum depression is in fact on the rise.

Among the other answers, (A) can be eliminated since just because women's health has increased, there is no telling whether spending to prevent postpartum depression has increased. (B) can be eliminated since another agency outside the government might keep track of rates of postpartum depression so this doesn't affect the argument. (C) can be eliminated since just because the minimum severity of symptoms required for diagnosis has increased doesn't mean that the rate has not increased. (E) can be eliminated because it would in fact strengthen the argument posed.
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1970 in D kills that option. Until 1970 fine. What about 2018? Now that postpartum depression is segregated from depression, it is still on the rise. 20 years data(1950-70) is more important than 48 years of another data(1970-2018)?
IMO C
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mikemcgarry can you please help us understand why option C is incorrect.
Also option D is suggesting time period after 1970 but the premise is saying that it is from 1950 to the present .
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C can't be correct as it would lead to a decrease in the number of women being diagnosed with postpartum depression. If the minimum threshold of symptoms women experience before they can be diagnosed has increased since 1950, people who previously would have been diagnosed with it now won't be diagnosed with postpartum depression as they don't meet the new minimum threshold. Option D has a time period after 1970 which fits within the time period from 1950 to the present.
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The stimulus here is that there are ten times as many people being diagnosed with postpartum depression now than there were in 1950. Since we're looking at a weaken question, we're looking for the gap in logic that's going to mean that the argument could be wrong.

The obvious ones are going to be things like 1) what if the category didn't exist in 1950? 2) Can an improvement in the systems for supporting women here even help?

A. can be thrown out. It doesn't address the gap - just because funding has increased doesn't mean that systems have gotten better or that more or fewer women should be expected to be diagnosed.

B. can also be thrown out since it shouldn't matter where the stats are coming from.

C. is tricky, but if C were true it would actually strengthen the conclusion rather than weaken it. Think about it this way: if the threshold of symptoms for something goes up, then you would expect that fewer people would be diagnosed with the illness, not more.

D. works -- Say there are 100 cases of postpartum depression in 1950 - 5 of which were actually diagnosed as postpartum depression and 95 of which were diagnosed under the banner of depression. Then starting from 1970 to present the diagnosis categories change. If 50 people have a listed diagnosis as postpartum depression and 10 people are diagnosed under the banner of depression but in fact have postpartum depression, then even though the total number of people with the symptoms of postpartum depression has gone down (100 --> 55), the number of diagnoses has gone up by a factor of 10.

E. Doesn't really give us information one way or the other.
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This is quite similar to an official question " the classical music "

The conclusion includes the key word "must" implying that without the implementation of plan the increment in the Post depression will not stop.
Now challenge the argument saying " is it a must?"

You'll see that D option actually says that the entire basis of the author's conclusion is based on faulty evidence.

P.S. search the phrase "classical music" in gmatclub,you'll find a similar argument . And a decent explanation by GMATNinja

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this question is horrible,, C is strengthen and D is a possible/potential weaker, but that is all, a possible/potential weaker, we need 100% weaker
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Hi KarishmaB,

I couldn't agree with your explanation for D,
I don't think (D) is the right answer here,

lets say up till 1970 we had 2000 cases of women with PD but most doctors identified them as depression, so the number for PD for most doctors was 0

but in 1980, let's say people started identifying PD, and so doctors identified these 2000 cases as cases for PD

in 1990, the number again increased by a factor of 10

in 2000, again the number increased by a factor of 10

so the number kept rising until present

this would have been the right answer had we been given that the misdiagnosis continued till present

but the misdiagnosis was stopped in 1970

from that moment on, up until present, the number kept rising

what is the reason for that rise in number when we had correct diagnosis?

this is not explained by (D)
KarishmaB
Bunuel
Senator: Between 1950 and present, the number of women diagnosed with postpartum depression each year in the country of Heranita has increased by a factor of ten. We must improve our systems for supporting women after childbirth to stem this increase in the number of new mothers experiencing postpartum depression.

Which of the following, if true, would most call the argument above into question?


A. The amount of spending on women’s health has increased since 1950.

B. Rates of postpartum depression are not included in official government statistics.

C. The minimum threshold of symptoms women experience before they can be diagnosed has increased since 1950.

D. Until 1970, most doctors were not specific in their diagnoses but instead grouped all types of depression together.

E. It is likely that cases of postpartum depression are underreported in Heranita.

Between 1950 and present, the number of women diagnosed with PP depression each year has increased by a factor of ten. (So in 1950, if 200 women had PP depression, now 2000 do)
We must improve our systems for supporting women after childbirth to stem this increase in the number of new mothers experiencing postpartum depression.

What will call this argument into question?
There are various ways:
- If we can say that number of new mothers has increased by a factor of 20, then PP depression seems to have reduced percentage wise.
- If we can say that it existed in similar numbers before but was just not diagnosed before, that will call our argument into question.
- If we can say that it existed in similar numbers but was misdiagnosed as some other disease, that will serve the purpose too.
etc

A. The amount of spending on women’s health has increased since 1950.

Irrelevant

B. Rates of postpartum depression are not included in official government statistics.

Irrelevant

C. The minimum threshold of symptoms women experience before they can be diagnosed has increased since 1950.

This should have led to fewer cases, not more.

D. Until 1970, most doctors were not specific in their diagnoses but instead grouped all types of depression together.

So PP depression was not diagnosed as such by MOST doctors earlier. It was just called depression. Then it is possible that 2000 women had PP depression in 1950 also but for 1800 of them, it was just called depression. Only very few doctors identified PP depression and hence we got the number fo 200 in 1950.
This weakens our argument.

E. It is likely that cases of postpartum depression are underreported in Heranita.

This means that there are even more cases than 2000 and perhaps there were more than 200 in 1950. Doesn't help.

Answer (D)
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RiyaJ0032
Hi KarishmaB,

I couldn't agree with your explanation for D,
I don't think (D) is the right answer here,

lets say up till 1970 we had 2000 cases of women with PD but most doctors identified them as depression, so the number for PD for most doctors was 0

but in 1980, let's say people started identifying PD, and so doctors identified these 2000 cases as cases for PD

in 1990, the number again increased by a factor of 10

in 2000, again the number increased by a factor of 10

so the number kept rising until present

this would have been the right answer had we been given that the misdiagnosis continued till present

but the misdiagnosis was stopped in 1970

from that moment on, up until present, the number kept rising

what is the reason for that rise in number when we had correct diagnosis?

this is not explained by (D)
KarishmaB
Bunuel
Senator: Between 1950 and present, the number of women diagnosed with postpartum depression each year in the country of Heranita has increased by a factor of ten. We must improve our systems for supporting women after childbirth to stem this increase in the number of new mothers experiencing postpartum depression.

Which of the following, if true, would most call the argument above into question?


A. The amount of spending on women’s health has increased since 1950.

B. Rates of postpartum depression are not included in official government statistics.

C. The minimum threshold of symptoms women experience before they can be diagnosed has increased since 1950.

D. Until 1970, most doctors were not specific in their diagnoses but instead grouped all types of depression together.

E. It is likely that cases of postpartum depression are underreported in Heranita.

Between 1950 and present, the number of women diagnosed with PP depression each year has increased by a factor of ten. (So in 1950, if 200 women had PP depression, now 2000 do)
We must improve our systems for supporting women after childbirth to stem this increase in the number of new mothers experiencing postpartum depression.

What will call this argument into question?
There are various ways:
- If we can say that number of new mothers has increased by a factor of 20, then PP depression seems to have reduced percentage wise.
- If we can say that it existed in similar numbers before but was just not diagnosed before, that will call our argument into question.
- If we can say that it existed in similar numbers but was misdiagnosed as some other disease, that will serve the purpose too.
etc

A. The amount of spending on women’s health has increased since 1950.

Irrelevant

B. Rates of postpartum depression are not included in official government statistics.

Irrelevant

C. The minimum threshold of symptoms women experience before they can be diagnosed has increased since 1950.

This should have led to fewer cases, not more.

D. Until 1970, most doctors were not specific in their diagnoses but instead grouped all types of depression together.

So PP depression was not diagnosed as such by MOST doctors earlier. It was just called depression. Then it is possible that 2000 women had PP depression in 1950 also but for 1800 of them, it was just called depression. Only very few doctors identified PP depression and hence we got the number fo 200 in 1950.
This weakens our argument.

E. It is likely that cases of postpartum depression are underreported in Heranita.

This means that there are even more cases than 2000 and perhaps there were more than 200 in 1950. Doesn't help.

Answer (D)


Where are you given that in each decade it increased by a factor of 10? It has increased by a factor of 10 from 1950 to today. Highlighted above.
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KarishmaB,

it's given right,

the number of women diagnosed with PP "Each year" has increased by a factor of 10
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RiyaJ0032
KarishmaB,

it's given right,

the number of women diagnosed with PP "Each year" has increased by a factor of 10

That defines the stat "the number of women diagnosed with PP each year". Without it, "the number of women diagnosed with PP" makes no sense as a statistic. The number of women diagnosed with PP in how many days/weeks/months/years?
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Hello Karishma,

Thankyou for providing this clarification. Needed some clarification. In my tutoring it was told to me that premise and counter premise could not be challenged. However, I have observed that in weakening questions we generally cast a doubt in the premise. (as in this case) - could you please respond to this.
KarishmaB
Bunuel
Senator: Between 1950 and present, the number of women diagnosed with postpartum depression each year in the country of Heranita has increased by a factor of ten. We must improve our systems for supporting women after childbirth to stem this increase in the number of new mothers experiencing postpartum depression.

Which of the following, if true, would most call the argument above into question?


A. The amount of spending on women’s health has increased since 1950.

B. Rates of postpartum depression are not included in official government statistics.

C. The minimum threshold of symptoms women experience before they can be diagnosed has increased since 1950.

D. Until 1970, most doctors were not specific in their diagnoses but instead grouped all types of depression together.

E. It is likely that cases of postpartum depression are underreported in Heranita.

Between 1950 and present, the number of women diagnosed with PP depression each year has increased by a factor of ten. (So in 1950, if 200 women had PP depression, now 2000 do)
We must improve our systems for supporting women after childbirth to stem this increase in the number of new mothers experiencing postpartum depression.

What will call this argument into question?
There are various ways:
- If we can say that number of new mothers has increased by a factor of 20, then PP depression seems to have reduced percentage wise.
- If we can say that it existed in similar numbers before but was just not diagnosed before, that will call our argument into question.
- If we can say that it existed in similar numbers but was misdiagnosed as some other disease, that will serve the purpose too.
etc

A. The amount of spending on women’s health has increased since 1950.

Irrelevant

B. Rates of postpartum depression are not included in official government statistics.

Irrelevant

C. The minimum threshold of symptoms women experience before they can be diagnosed has increased since 1950.

This should have led to fewer cases, not more.

D. Until 1970, most doctors were not specific in their diagnoses but instead grouped all types of depression together.

So PP depression was not diagnosed as such by MOST doctors earlier. It was just called depression. Then it is possible that 2000 women had PP depression in 1950 also but for 1800 of them, it was just called depression. Only very few doctors identified PP depression and hence we got the number fo 200 in 1950.
This weakens our argument.

E. It is likely that cases of postpartum depression are underreported in Heranita.

This means that there are even more cases than 2000 and perhaps there were more than 200 in 1950. Doesn't help.

Answer (D)
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It is correct that premises are taken to be true.

Here also, the premise (Between 1950 and present, the number of women diagnosed with PP depression each year has increased by a factor of ten.) is not being challenged. The number of women diagnosed with PP (not those who suffered from PP, but those who were diagnosed as having PP) has increased by a factor of 10 has been accepted.

The point the correct option is making is that the cases of PP may not have increased because PP cases were likely not categorized as PP in previous years. They were categorized as depression usually.
So though there could have been as many cases of PP now as before but now they are categorized correctly as PP. That is why there is a big jump.

We did not challenge any premise.


dns1357
Hello Karishma,

Thankyou for providing this clarification. Needed some clarification. In my tutoring it was told to me that premise and counter premise could not be challenged. However, I have observed that in weakening questions we generally cast a doubt in the premise. (as in this case) - could you please respond to this.
KarishmaB
Bunuel
Senator: Between 1950 and present, the number of women diagnosed with postpartum depression each year in the country of Heranita has increased by a factor of ten. We must improve our systems for supporting women after childbirth to stem this increase in the number of new mothers experiencing postpartum depression.

Which of the following, if true, would most call the argument above into question?


A. The amount of spending on women’s health has increased since 1950.

B. Rates of postpartum depression are not included in official government statistics.

C. The minimum threshold of symptoms women experience before they can be diagnosed has increased since 1950.

D. Until 1970, most doctors were not specific in their diagnoses but instead grouped all types of depression together.

E. It is likely that cases of postpartum depression are underreported in Heranita.

Between 1950 and present, the number of women diagnosed with PP depression each year has increased by a factor of ten. (So in 1950, if 200 women had PP depression, now 2000 do)
We must improve our systems for supporting women after childbirth to stem this increase in the number of new mothers experiencing postpartum depression.

What will call this argument into question?
There are various ways:
- If we can say that number of new mothers has increased by a factor of 20, then PP depression seems to have reduced percentage wise.
- If we can say that it existed in similar numbers before but was just not diagnosed before, that will call our argument into question.
- If we can say that it existed in similar numbers but was misdiagnosed as some other disease, that will serve the purpose too.
etc

A. The amount of spending on women’s health has increased since 1950.

Irrelevant

B. Rates of postpartum depression are not included in official government statistics.

Irrelevant

C. The minimum threshold of symptoms women experience before they can be diagnosed has increased since 1950.

This should have led to fewer cases, not more.

D. Until 1970, most doctors were not specific in their diagnoses but instead grouped all types of depression together.

So PP depression was not diagnosed as such by MOST doctors earlier. It was just called depression. Then it is possible that 2000 women had PP depression in 1950 also but for 1800 of them, it was just called depression. Only very few doctors identified PP depression and hence we got the number fo 200 in 1950.
This weakens our argument.

E. It is likely that cases of postpartum depression are underreported in Heranita.

This means that there are even more cases than 2000 and perhaps there were more than 200 in 1950. Doesn't help.

Answer (D)
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