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# A drug that is highly effective in treating many types of

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Manager
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A drug that is highly effective in treating many types of [#permalink]

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13 Mar 2011, 19:48
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A drug that is highly effective in treating many types of infection can, at present, be obtained only from the bark of the ibora, a tree that is quite rare in the wild. It takes the bark of 5,000 trees to make one kilogram of the drug. It follows, therefore, that continued production of the drug must inevitably lead to the ibora’s extinction.
Which of the following, if true, most seriously weakens the argument above?
(A) The drug made from ibora bark is dispensed to doctors from a central authority.
(B) The drug made from ibora bark is expensive to produce.
(C) The leaves of the ibora are used in a number of medical products.
(D) The ibora can be propagated from cuttings and grown under cultivation.
(E) The ibora generally grows in largely inaccessible places.
[Reveal] Spoiler: OA

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Re: bark of the ibora tree [#permalink]

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13 Mar 2011, 21:02
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answer should be D. If the tree is inaccessible, it means that the drug would be not produced. however, that is not an option. the question clearly states- continued production of the drug as a given, and the assumption is that it will lead to extinction of the tree. that has to be challenged, and the fact that ibora can grow from cutting and under cultivation means that even if the drug continues to be produced, more and more Ibora trees can be grown.

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Re: bark of the ibora tree [#permalink]

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14 Mar 2011, 13:34
vivesomnium wrote:
answer should be D. If the tree is inaccessible, it means that the drug would be not produced. however, that is not an option. the question clearly states- continued production of the drug as a given, and the assumption is that it will lead to extinction of the tree. that has to be challenged, and the fact that ibora can grow from cutting and under cultivation means that even if the drug continues to be produced, more and more Ibora trees can be grown.

i too chose D as it says we have a way to grow the ibore.
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Re: bark of the ibora tree [#permalink]

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14 Mar 2011, 21:21
I also choose "D".
Please refer to http://www.manhattangmat.com/forums/a-d ... t3788.html for the correct answer.It is D.

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Re: bark of the ibora tree [#permalink]

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15 Mar 2011, 20:28
Thanks...guess my source of answer is incorrect...

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Re: bark of the ibora tree [#permalink]

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11 Feb 2014, 05:35
Hii i just saw that the question is weaken the argument and not the conclusion that is after therefore

I am not justifying the answer

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Re: A drug that is highly effective in treating many types of [#permalink]

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01 Aug 2016, 21:47
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Hello! I am beginner here. The following tips helped me a lot to find the accurate answer.
1. Identifying & summarising conclusion
Perpetuating production of the drug will most likely to destroy Ibora.
2. Identifying & summarising premise
5000 Ibora trees are required to make 1kg of drug
High effectiveness in treatment leads to demand
Ibora is already rare tree in the wild.
3. Identifying possible assumption:
- Medical innovation to artificially create drug which has equal effectiveness as Ibora
- To plant Ibora
- Making it illegal

(A) The drug made from ibora bark is dispensed to doctors from a central authority.
Giving out drug will enable drug production. Therefore, it is STRENGTHENING the conclusion.
(B) The drug made from ibora bark is expensive to produce.
Inclusive purchase can be done with the people who has enough money to buy the drug.
(C) The leaves of the ibora are used in a number of medical products.
It is indicating uses of Ibora tree for medical purpose. It is NOT weakening the conclusion.
(D) The ibora can be propagated from cuttings and grown under cultivation.
This option is clearly weakening the conclusion. Because, as stated in the assumption, planting Ibora can be solution to prevent from extinction.
(E) The ibora generally grows in largely inaccessible places.
Even though, there is some difficulties, it doesn't mean that the production will be ceased.

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Re: A drug that is highly effective in treating many types of [#permalink]

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02 Aug 2016, 00:44
Prethinking

1} if only mg amount of bark is required..then 1kg is enough

forever..no extinction
2} if tree capable to grow nAturally at such a rate that it will replace tree that has been cut

D and e seems contender. D more strong..if you can save cutting you can cultivate it any time you want.
E ~ currently not accessible ~ you may reach it or you may not.

Imo d

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A drug that is highly effective in treating many types of [#permalink]

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09 Jul 2017, 10:41
Conclusion: Production of Ibora will eventually lead to its extinction
Premise 1: Ibora effective in treating many infections
Premise 2: A lot of Ibora bark needed to produce a small quantity of medicine
We need to find the answer that weakens the conclusion

(A) The drug made from ibora bark is dispensed to doctors from a central authority. - Does this weaken the conclusion? NO. If anything this is out of scope. We are not focused on how the drug is dispensed. Only its creation.

(B) The drug made from ibora bark is expensive to produce.- Does this weaken the conclusion? NO. If anything this strengthens the premise that Ibora is rare and thus expensive.

(C) The leaves of the ibora are used in a number of medical products - Does this weaken the conclusion? NO. This strengthens the usefulness of Ibora and hence more might be needed. Does not focus on the creation.

(D) The ibora can be propagated from cuttings and grown under cultivation. Does this weaken the conclusion?YES. If we can grow Ibora artificially, we can reduce the impact on its wild population thus probably avoid its extinction. Although this does not demolish the conclusion, it certainly weakens it.

(E) The ibora generally grows in largely inaccessible places.- Does this weaken the conclusion? NO. This is out of scope. The location where Iboras grow does not matter because the premise clearly says we are already harvesting it to a large extent.
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Re: A drug that is highly effective in treating many types of [#permalink]

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25 Aug 2017, 23:53
fanatico wrote:
A drug that is highly effective in treating many types of infection can, at present, be obtained only from the bark of the ibora, a tree that is quite rare in the wild. It takes the bark of 5,000 trees to make one kilogram of the drug. It follows, therefore, that continued production of the drug must inevitably lead to the ibora’s extinction.
Which of the following, if true, most seriously weakens the argument above?
(A) The drug made from ibora bark is dispensed to doctors from a central authority.
(B) The drug made from ibora bark is expensive to produce.
(C) The leaves of the ibora are used in a number of medical products.
(D) The ibora can be propagated from cuttings and grown under cultivation.
(E) The ibora generally grows in largely inaccessible places.

In order to avoid the extinction, we need to find a counter statement that can tell us that there are other methods to cultivate this trees

Based on all the options only option D is close to tell us that missing reason.
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Re: A drug that is highly effective in treating many types of [#permalink]

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29 Nov 2017, 04:56
fanatico wrote:
A drug that is highly effective in treating many types of infection can, at present, be obtained only from the bark of the ibora, a tree that is quite rare in the wild. It takes the bark of 5,000 trees to make one kilogram of the drug. It follows, therefore, that continued production of the drug must inevitably lead to the ibora’s extinction.
Which of the following, if true, most seriously weakens the argument above?
(A) The drug made from ibora bark is dispensed to doctors from a central authority.
(B) The drug made from ibora bark is expensive to produce.
(C) The leaves of the ibora are used in a number of medical products.
(D) The ibora can be propagated from cuttings and grown under cultivation.
(E) The ibora generally grows in largely inaccessible places.

Can someone please explain why cant E be the right answer. If ibore is grows in inaccessible places, then those plants could not be used for production of the drug. Therefore those plants still remain in some inaccessible places.
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A drug that is highly effective in treating many types of [#permalink]

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29 Nov 2017, 06:49
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sumanainampudi wrote:
fanatico wrote:
A drug that is highly effective in treating many types of infection can, at present, be obtained only from the bark of the ibora, a tree that is quite rare in the wild. It takes the bark of 5,000 trees to make one kilogram of the drug. It follows, therefore, that continued production of the drug must inevitably lead to the ibora’s extinction.
Which of the following, if true, most seriously weakens the argument above?
(A) The drug made from ibora bark is dispensed to doctors from a central authority.
(B) The drug made from ibora bark is expensive to produce.
(C) The leaves of the ibora are used in a number of medical products.
(D) The ibora can be propagated from cuttings and grown under cultivation.
(E) The ibora generally grows in largely inaccessible places.

Can someone please explain why cant E be the right answer. If ibore is grows in inaccessible places, then those plants could not be used for production of the drug. Therefore those plants still remain in some inaccessible places.

We need to weaken that continued production of the drug must inevitably lead to the ibora’s extinction. So the cocnclusion talks about a post effect of production of drug; the drug is already produced as per the conclusion. E is questioning something that is assumed to be happening in the main conclusion. Weaken the result of action and not the action itself.
As per your query ("...then those plants could not be used for production of the drug."), E is weakening the action at the first place, which is taken to be true in the conclusion.
Hope it helped.
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A drug that is highly effective in treating many types of   [#permalink] 29 Nov 2017, 06:49
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