achan wrote:
Advertisement: For sinus pain, three out of four hospitals give their patients Novex. So when you want the most effective painkiller for sinus pain, Novex is the one to choose.
Which of the following, if true, most seriously undermines the advertisement’s argument?
(A) Some competing brands of painkillers are intended to reduce other kinds of pain in addition to sinus pain.
(B) Many hospitals that do not usually use Novex will do so for those patients who cannot tolerate the drug the hospitals usually use.
(C) Many drug manufacturers increase sales of their products to hospitals by selling these products to the hospitals at the lowest price the manufacturers can afford.
(D) Unlike some competing brands of painkillers, Novex is available from pharmacies without a doctor’s prescription.
(E) In clinical trials Novex has been found more effective than competing brands of painkillers that have been on the market longer than Novex.
3 of the 4 hospitals use Novel.
Conclusion: Novex is most effective.
Weaken it. Note that we have to weaken that it is most effective. We need to say that it may not be the most effective but hospitals may be using it for some other reason - quickly available/easy to administer/cheap/no side effects etc.
(A) Some competing brands of painkillers are intended to reduce other kinds of pain in addition to sinus pain.
Irrelevant
(B) Many hospitals that do not usually use Novex will do so for those patients who cannot tolerate the drug the hospitals usually use.
The 1 out of 4 hospitals that do not use Novex use say Medicine X usually.
These hospitals use Novex in cases where patients cannot tolerate Medicine X.
What does this tell us about Novex? Just that in some cases, patients tolerate Novex though they do not tolerate some other medicines.
Does it have anything to do with effectiveness of Novex? No.
aritrar4 - if you assume that a hospital will give the most effective drug first, and 3 out of 4 hospitals give Novex, then Novex is the most effective (as per the judgment of the hospitals). Then how can we weaken it anyway?
We can make no such assumption. There could be any number of reasons a hospital/doctor may prescribe one medicine over another. A doctor may prescribe even a costlier medicine over a cheaper brand only because the manufacturer gives him free tickets to a play! Think of economy as it is - not as it ideally should be.
(C) Many drug manufacturers increase sales of their products to hospitals by selling these products to the hospitals at the lowest price the manufacturers can afford.
By selling at cheaper prices, many manufacturers increase the sales of their products. So hospitals buy more of those products which are available at a cheaper price. This could be the reason 3 out of 4 hospitals use Novex. Hence it weakens our conclusion. It brings in doubt in our mind about the reason why most hospitals prescribe Novex. It tells us that in the decision of the hospitals about which medicine to give, other factors are at play.
(D) Unlike some competing brands of painkillers, Novex is available from pharmacies without a doctor’s prescription.
We are talking about hospitals giving the medicine to their patients, not what patients may take themselves.
(E) In clinical trials Novex has been found more effective than competing brands of painkillers that have been on the market longer than Novex.
Strengthens that Novex is more effective.
Answer (C)
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