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# Wild cheetahs live in the African grasslands. Previous

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Re: Wild cheetahs live in the African grasslands. Previous [#permalink]

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25 Sep 2012, 20:16
arnivorous wrote:
joshnsit wrote:
Wild cheetahs live in the African grasslands. Previous estimates of the size that the wild cheetah population must be in order for these animals to survive a natural disaster in the African grasslands region were too small, and the current population barely meets the previous estimates, At present, however, there is not enough African grassland to support a wild cheetah population larger than the current population.
The statements above, if true, most strongly support which one of the following conclusions?
(A) Previous estimates of the size of the existing wild cheetah population were inaccurate. opposite answer
(B) The cheetah's natural habitat is decreasing in size at a faster rate than is the size of the wild cheetah population.out of scope
(C) The principal threat to the endangered wild cheetah population is neither pollution nor hunting, but a natural disaster. out of scope
(D) In the short term, the wild cheetah population will be incapable of surviving a natural disaster in the African grasslands. Correct answer. The current population size does not meet the population size required to survive a natural disaster. At the present, there is not enough African grassland to support a larger population. Conclusion: The current population is incapable of surviving a natural disaster.
(E) In regions where land is suitable for cheetah habitation, more natural disasters are expected to occur during the next decade than occurred during the past decade.out of scope

Please comment your reasons while giving answer options. I will come back with OA once I get some correct reasoning flowing in.
Also, let me know which kind of question type this question is...

Power Score CR will call it "Most Supported" or "Must be True" type

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Re: Wild cheetahs live in the African grasslands. Previous [#permalink]

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26 Sep 2012, 20:03
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Expert's post
joshnsit wrote:
Wild cheetahs live in the African grasslands. Previous estimates of the size that the wild cheetah population must be in order for these animals to survive a natural disaster in the African grasslands region were too small, and the current population barely meets the previous estimates, At present, however, there is not enough African grassland to support a wild cheetah population larger than the current population.
The statements above, if true, most strongly support which one of the following conclusions?
(A) Previous estimates of the size of the existing wild cheetah population were inaccurate.
(B) The cheetah's natural habitat is decreasing in size at a faster rate than is the size of the wild cheetah population.
(C) The principal threat to the endangered wild cheetah population is neither pollution nor hunting, but a natural disaster.
(D) In the short term, the wild cheetah population will be incapable of surviving a natural disaster in the African grasslands.
(E) In regions where land is suitable for cheetah habitation, more natural disasters are expected to occur during the next decade than occurred during the past decade.

Please comment your reasons while giving answer options. I will come back with OA once I get some correct reasoning flowing in.
Also, let me know which kind of question type this question is...

Look at the argument:
Previous estimates of 'cheetah population required to survive a natural disaster' were too small. (e.g. Previous estimate - if there are 100 cheetahs, they can survive a natural disaster. This estimate is too small. You perhaps need at least 200 to survive a natural disaster)
The current population barely meets the previous estimates. (The current pop is barely 100)
At present there is not enough African grassland to support a wild cheetah population larger than the current population. (So the population can't increase in the short term)

What can you say from this? What does this lead to?

That in the short term, if there is a natural disaster, the cheetahs probably will not survive it. (Option D)

(A) Previous estimates of the size of the existing wild cheetah population were inaccurate.
No. Previous estimates of 'cheetah population required to survive a natural disaster' were inaccurate. Not the estimates of current cheetah population.

(B) The cheetah's natural habitat is decreasing in size at a faster rate than is the size of the wild cheetah population.
The argument doesn't say that the natural habitat is decreasing. It only says that at present, it cannot increase. The rate of increase/decrease is anyway out of question.
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Re: Wild cheetahs live in the African grasslands. Previous [#permalink]

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27 Sep 2012, 00:23
Thank u karishma..realy nice explanation ..

I seleceted A and b..

but after looking at ur explanation..i can say ..yup its D..
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Re: Wild cheetahs live in the African grasslands. Previous [#permalink]

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Wild cheetahs live in the African grasslands [#permalink]

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28 Jul 2014, 08:09
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This is my new project: Renew Old Thread => Back to basic => Just try It and give your reasoning
The topic will be sticky for 2 days from starting

Wild cheetahs live in the African grasslands. Previous estimates of the size that the wild cheetah population must be in order for these animals to survive a natural disaster in the African grasslands region were too small, and the current population barely meets the previous estimates, At present, however, there is not enough African grassland to support a wild cheetah population larger than the current population.

The statements above, if true, most strongly support which one of the following conclusions?

(A) Previous estimates of the size of the existing wild cheetah population were inaccurate.
(B) The cheetah's natural habitat is decreasing in size at a faster rate than is the size of the wild cheetah population.
(C) The principal threat to the endangered wild cheetah population is neither pollution nor hunting, but a natural disaster.
(D) In the short term, the wild cheetah population will be incapable of surviving a natural disaster in the African grasslands.
(E) In regions where land is suitable for cheetah habitation, more natural disasters are expected to occur during the next decade than occurred during the past decade.
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Re: Wild cheetahs live in the African grasslands [#permalink]

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22 Aug 2014, 10:28
if D is the answer can someone please explain how the passage supports the claim that the size of grassland and cheetah population is not increasing, the passage doesn't give any information on the trend
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Wild cheetahs live in the African grasslands [#permalink]

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22 Aug 2014, 14:41
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if D is the answer can someone please explain how the passage supports the claim that the size of grassland and cheetah population is not increasing, the passage doesn't give any information on the trend

THEORIES:
Conclusion question.
Must pass the “Fact test”. Do not infer too far, just stick to premises.
Must show the main point, not just repeat the premises.
Pass the fact test, but only rephrase the premises (repeat one, two premises or combination of premises)
Out of scope or infer too far (not pass the fact test).

STIMULUS:
Fact 1: Wild cheetahs live in the African grasslands. Necessary condition.
Fact 2: Previous estimates of the size that the wild cheetah population must be in order for these animals to survive a natural disaster in the African grasslands region were too small. FACT
Fact 3: The current population barely meets the previous estimates. FACT
Fact 4: At present there is not enough African grassland to support a wild cheetah population larger than the current population. --> Necessary condition is not met.

ANALYZE THE STIMULUS:
Fact 2 means previous cheetah population needed to survive a natural disaster was too small.
Fact 3 means the current cheetah population is even smaller that that in the past. It means the current cheetah population is not enough to survive a natural disaster.
Fact 4 means the current cheetah population can’t become larger because there is not enough African grassland. Fact 4 clearly states that the cheetah population is not increasing, at least in the short term.

Combine fact 2, 3, 4 we can say that in the short term, the wild cheetah population will be incapable of surviving a natural disaster in the African grasslands.

Thus, D is correct.

Hope it’s clear.
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Re: Wild cheetahs live in the African grasslands [#permalink]

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22 Aug 2014, 23:19
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It not an easy task to get to the right conclusion here, thanks to the wordy premises
Facts and premises are explained well in above post. I will go for an example case

from the 1st statement it is clear that though Cheetahs population was less, the grassland area was good enough,if not great.

Case1; in 10 sqkm area there are 20 cheetahs. Natural disaster-->very low chances that many cheetahs getting effected, but still the effect is huge as population is less.

Case2: Huge reduction in grassland area: 5 sqkm existing. Chettahs-16 (less than earlier 20)
But here if natural disaster occurs, more cheetahs will get affected as they are confined in less area to save their lives. and at the same time more cheetah's are influenced by the disaster coz of limitations.

So I went with D as it brings out this case

If it is not clear, plz let me know, i will try up presenting in a better way.
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Wild cheetahs live in the African grasslands [#permalink]

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24 Aug 2014, 08:30
Okay what I don't understand is the use of the words in the short term . Let me explain:-
We already know that the previous estimates were wrong and way too small to survive a natural disaster. We also know that the current population barely meets the previous estimates. Thus, we can infer that today, the current population is incapable of surviving a natural disaster. So why the use of in the short term. These words were the only I reason I discounted this statement
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Wild cheetahs live in the African grasslands [#permalink]

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24 Aug 2014, 11:04
mahendru1992 wrote:
Okay what I don't understand is the use of the words in the short term . Let me explain:-
We already know that the previous estimates were wrong and way too small to survive a natural disaster. We also know that the current population barely meets the previous estimates. Thus, we can infer that today, the current population is incapable of surviving a natural disaster. So why the use of in the short term. These words were the only I reason I discounted this statement

Hi mahendru1992,

Happy to help. What you're doing is saying that the information in the prompt supports the idea that the Wild Cheetah won't survive a natural disaster beyond just in the short-term. So how is it that we can only infer that its short-term?

The distinction comes down to knowing EXACTLY what this question is asking for. This is an inference question, which means we're asked to find an answer that HAS TO BE TRUE.

It comes down to this: just ask yourself, "do we know for sure that the Wild Cheetah population is incapable of surviving a natural disaster in the short-term?" If you're thinking the incapability is even further than short-term, than the answer to this question would HAVE TO BE: YES!

To use a different example to demonstrate the exact same logic why D has to be right: let's say we know that somebody ran at least 10 miles. Do we know that the person ran at least 1 mile? Yes. Same exact logic. If the data supports a greater range, you can infer a smaller part of that range.
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Wild cheetahs live in the African grasslands [#permalink]

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24 Aug 2014, 11:12
AllenEMPOWERgmat wrote:
mahendru1992 wrote:
Okay what I don't understand is the use of the words in the short term . Let me explain:-
We already know that the previous estimates were wrong and way too small to survive a natural disaster. We also know that the current population barely meets the previous estimates. Thus, we can infer that today, the current population is incapable of surviving a natural disaster. So why the use of in the short term. These words were the only I reason I discounted this statement

Hi mahendru1992,

Happy to help. What you're doing is saying that the information in the prompt supports the idea that the Wild Cheetah won't survive a natural disaster beyond just in the short-term. So how is it that we can only infer that its short-term?

The distinction comes down to knowing EXACTLY what this question is asking for. This is an inference question, which means we're asked to find an answer that HAS TO BE TRUE.

It comes down to this: just ask yourself, "do we know for sure that the Wild Cheetah population is incapable of surviving a natural disaster in the short-term?" If you're thinking the incapability is even further than short-term, than the answer to this question would HAVE TO BE: YES!

To use a different example to demonstrate the exact same logic why D has to be right: let's say we know that somebody ran at least 10 miles. Do we know that the person ran at least 1 mile? Yes. Same exact logic. If the data supports a greater range, you can infer a smaller part of that range.

But if we do take a parallel example, shouldn't the analogy be if the person ran atleast 1 mile, could he have ran 10 miles? And the answer is of course he couldn't or maybe he did, but we don't know for sure.
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Re: Wild cheetahs live in the African grasslands [#permalink]

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24 Aug 2014, 11:20
mahendru1992 wrote:
AllenEMPOWERgmat wrote:
mahendru1992 wrote:
Okay what I don't understand is the use of the words in the short term . Let me explain:-
We already know that the previous estimates were wrong and way too small to survive a natural disaster. We also know that the current population barely meets the previous estimates. Thus, we can infer that today, the current population is incapable of surviving a natural disaster. So why the use of in the short term. These words were the only I reason I discounted this statement

Hi mahendru1992,

Happy to help. What you're doing is saying that the information in the prompt supports the idea that the Wild Cheetah won't survive a natural disaster beyond just in the short-term. So how is it that we can only infer that its short-term?

The distinction comes down to knowing EXACTLY what this question is asking for. This is an inference question, which means we're asked to find an answer that HAS TO BE TRUE.

It comes down to this: just ask yourself, "do we know for sure that the Wild Cheetah population is incapable of surviving a natural disaster in the short-term?" If you're thinking the incapability is even further than short-term, than the answer to this question would HAVE TO BE: YES!

To use a different example to demonstrate the exact same logic why D has to be right: let's say we know that somebody ran at least 10 miles. Do we know that the person ran at least 1 mile? Yes. Same exact logic. If the data supports a greater range, you can infer a smaller part of that range.

But if we do take a parallel example, shouldn't the analogy be if the person ran atleast 1 mile, could he have ran 10 miles? And the answer is of course he couldn't or maybe he did, but we don't know for sure.

Hi mahendru1992,

I think you may have mis-read. The fact was that he ran AT LEAST 10 miles. If he ran at least 10 miles, do we know that he ran at least 1? Of course. See the distinction?
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Re: Wild cheetahs live in the African grasslands [#permalink]

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25 Aug 2014, 00:40
AllenEMPOWERgmat wrote:

Hi mahendru1992,

I think you may have mis-read. The fact was that he ran AT LEAST 10 miles. If he ran at least 10 miles, do we know that he ran at least 1? Of course. See the distinction?

Hi, sorry for troubling you, but I don't get it.
Okay, so what you mean is that if in the short term we know that the cheetah population wouldn't survive, then it's obvious that we know that the population wouldn't survive today per se. Am I right?
But what I'm trying to say is that the argument says that today we know that the population wouldn't survive a natural disaster but we don't know anything about the future, even if it's a short one. I mean what if some restoration process occurs which helps in increasing the population or what if they bring other cheetahs from other countries or reserves. This doesn't make sense for a short term, but i'm sure there are other 'what ifs' that do qualify. Don't you think we're assuming too much?
Thanks for bearing with me
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Re: Wild cheetahs live in the African grasslands [#permalink]

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25 Aug 2014, 10:43
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Expert's post
mahendru1992 wrote:
AllenEMPOWERgmat wrote:

Hi mahendru1992,

I think you may have mis-read. The fact was that he ran AT LEAST 10 miles. If he ran at least 10 miles, do we know that he ran at least 1? Of course. See the distinction?

Hi, sorry for troubling you, but I don't get it.
Okay, so what you mean is that if in the short term we know that the cheetah population wouldn't survive, then it's obvious that we know that the population wouldn't survive today per se. Am I right?
But what I'm trying to say is that the argument says that today we know that the population wouldn't survive a natural disaster but we don't know anything about the future, even if it's a short one. I mean what if some restoration process occurs which helps in increasing the population or what if they bring other cheetahs from other countries or reserves. This doesn't make sense for a short term, but i'm sure there are other 'what ifs' that do qualify. Don't you think we're assuming too much?
Thanks for bearing with me

Hi mahendru1992,

No trouble at all. Let's lay out all of the facts once more, and you'll see how this goes beyond JUST the present moment:

Previous estimates of the cheetah to survive a natural disaster in the African grasslands region were too small. That means we know the number needs to be bigger.
The current population barely meets the previous estimates. That means that the current population is WAY below what it needs to survive if it doesn't meet the previous estimates which were already too low.
At present, there is not enough African grassland to support a wild cheetah population larger than the current population. This tells us that there is not even enough grassland to support a population any bigger than it is today.

Given those facts, is there any way the wild cheetah could survive a natural disaster of the short-term (say the next few months, maybe even a year?). No way. That's why D has to be right.

I think that the source of your doubt has to do with your definition of short-term. If you were thinking of it as something on the order of say 2-5 years, then, you're right, we can't infer that.
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Re: Wild cheetahs live in the African grasslands [#permalink]

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29 Oct 2014, 18:06
I see what you pointing at, but I am not sure whether we can jump to this conclusion. I don't understand what part of the premise says that for sure in short term the tigers will not survive a natural disaster if there is any. Maybe I am missing a point.
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Re: Wild cheetahs live in the African grasslands [#permalink]

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29 Oct 2014, 21:08
tuanquang269 wrote:
This is my new project: Renew Old Thread => Back to basic => Just try It and give your reasoning
The topic will be sticky for 2 days from starting

Wild cheetahs live in the African grasslands. Previous estimates of the size that the wild cheetah population must be in order for these animals to survive a natural disaster in the African grasslands region were too small, and the current population barely meets the previous estimates, At present, however, there is not enough African grassland to support a wild cheetah population larger than the current population.

The statements above, if true, most strongly support which one of the following conclusions?

(A) Previous estimates of the size of the existing wild cheetah population were inaccurate.
(B) The cheetah's natural habitat is decreasing in size at a faster rate than is the size of the wild cheetah population.
(C) The principal threat to the endangered wild cheetah population is neither pollution nor hunting, but a natural disaster.
(D) In the short term, the wild cheetah population will be incapable of surviving a natural disaster in the African grasslands.
(E) In regions where land is suitable for cheetah habitation, more natural disasters are expected to occur during the next decade than occurred during the past decade.

While I understand what this question is trying to say, and I answered it correctly, I think this is a poor question. Is it really true that the population would be INCAPABLE of surviving a natural disaster? Even if there is a .000001% chance of the population surviving, it still isn't incapable of surviving. Absolute language on CR questions is usually a major indicator that an answer choice is wrong. I think D would be a lot better stated, and more accurate, if it said "In the short term, the wild cheetah population would probably not survive a natural disaster in the African grasslands."
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Re: Wild cheetahs live in the African grasslands [#permalink]

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30 Oct 2014, 03:16
Yes I agree...the ans choice should sound more subtle than option D.

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Re: Wild cheetahs live in the African grasslands [#permalink]

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30 Oct 2014, 10:13
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Expert's post
pate13 wrote:
tuanquang269 wrote:
This is my new project: Renew Old Thread => Back to basic => Just try It and give your reasoning
The topic will be sticky for 2 days from starting

Wild cheetahs live in the African grasslands. Previous estimates of the size that the wild cheetah population must be in order for these animals to survive a natural disaster in the African grasslands region were too small, and the current population barely meets the previous estimates, At present, however, there is not enough African grassland to support a wild cheetah population larger than the current population.

The statements above, if true, most strongly support which one of the following conclusions?

(A) Previous estimates of the size of the existing wild cheetah population were inaccurate.
(B) The cheetah's natural habitat is decreasing in size at a faster rate than is the size of the wild cheetah population.
(C) The principal threat to the endangered wild cheetah population is neither pollution nor hunting, but a natural disaster.
(D) In the short term, the wild cheetah population will be incapable of surviving a natural disaster in the African grasslands.
(E) In regions where land is suitable for cheetah habitation, more natural disasters are expected to occur during the next decade than occurred during the past decade.

While I understand what this question is trying to say, and I answered it correctly, I think this is a poor question. Is it really true that the population would be INCAPABLE of surviving a natural disaster? Even if there is a .000001% chance of the population surviving, it still isn't incapable of surviving. Absolute language on CR questions is usually a major indicator that an answer choice is wrong. I think D would be a lot better stated, and more accurate, if it said "In the short term, the wild cheetah population would probably not survive a natural disaster in the African grasslands."

You are correct that the answer for these "draw a conclusion" questions will often be weak or trivial, but that is not a requirement. The real standard is to stay close to the precise wording of the argument and avoid answer choices that are STRONGER than the premises of the argument.

If you look at the premises here, you will find very strong language throughout: "size...must be...to survive", "too small", "not enough". These are very definitive statements and the answer choice isn't stronger than those premises.

That said, I agree that on the GMAT you would probably see a bit softer language, similar to what you have suggested. A good example of this is #103 - the Patria trade embargo question. The correct answer states: "Any trade embargo against Patria would be likely to fail at some time." Instead of absolute language like "will fail" the GMAT used "would be likely to fail".

KW
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Re: Wild cheetahs live in the African grasslands [#permalink]

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11 Nov 2015, 03:08
hi... challenging question, at least for me (with wordy premises)
Even though i appreciate above experts explanation, i always wonder to what extent this kind of in-depth analysis would be feasible to in real GMAT test?

Here is my quick analysis at first glance

---------------------

Wild cheetahs live in the African grasslands. Previous estimates of the size that the wild cheetah population must be in order for these animals to survive a natural disaster in the African grasslands region were too small, and the current population barely meets the previous estimates, At present, however, there is not enough African grassland to support a wild cheetah population larger than the current population.

The statements above, if true, most strongly support which one of the following conclusions?

(A) Previous estimates of the size of the existing wild cheetah population were inaccurate. - discusses only part of premises
(B) The cheetah's natural habitat is decreasing in size at a faster rate than is the size of the wild cheetah population. - rate at which population changes is out of scope
(C) The principal threat to the endangered wild cheetah population is neither pollution nor hunting, but a natural disaster. - pollution & hunting out of scope
(D) In the short term, the wild cheetah population will be incapable of surviving a natural disaster in the African grasslands.
(E) In regions where land is suitable for cheetah habitation, more natural disasters are expected to occur during the next decade than occurred during the past decade. - 2 time frames (past decade & next decade) not within scope
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Re: Wild cheetahs live in the African grasslands [#permalink]

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26 Mar 2016, 19:57
tuanquang269 wrote:
This is my new project: Renew Old Thread => Back to basic => Just try It and give your reasoning
The topic will be sticky for 2 days from starting

Wild cheetahs live in the African grasslands. Previous estimates of the size that the wild cheetah population must be in order for these animals to survive a natural disaster in the African grasslands region were too small, and the current population barely meets the previous estimates, At present, however, there is not enough African grassland to support a wild cheetah population larger than the current population.

The statements above, if true, most strongly support which one of the following conclusions?

(A) Previous estimates of the size of the existing wild cheetah population were inaccurate.
(B) The cheetah's natural habitat is decreasing in size at a faster rate than is the size of the wild cheetah population.
(C) The principal threat to the endangered wild cheetah population is neither pollution nor hunting, but a natural disaster.
(D) In the short term, the wild cheetah population will be incapable of surviving a natural disaster in the African grasslands.
(E) In regions where land is suitable for cheetah habitation, more natural disasters are expected to occur during the next decade than occurred during the past decade.

WC live in AG.
previous estimates of the size of population - were too small aka few WC were needed to survive.
now - population barely meets the previous estimates. aka more WC are needed for them to survive.
now - not enough AG to support larger populations of WC.

now WC barely survives. if AG reduces even more, WC will not survive.

A. might be true..nothing to clearly state this.
B. rate the AG is decreasing vs. rate WC's population is decreasing is irrelevant.
C. out of scope..compares threads not discussed in the argument
D. yes, if AG decreases even more, the population of WC, which at the moment is barely enough for the WC to survive, will decrease even more..and thus..WC will become extinct.
E. out of scope.

D is the best.
Re: Wild cheetahs live in the African grasslands   [#permalink] 26 Mar 2016, 19:57

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