Official Explanation:
Consultant to garden nursery: There is no good reason to hire six people to work on the floor of the nursery being built at the new location. The two existing nurseries each have four people to do that work, and at no point has this not been sufficient. Furthermore, the building at the new location is actually somewhat smaller.
Which of the following, if true, most seriously weakens the consultant’s argument?
A. The nursery at the new location will sell the same items that are sold at the two other locations.
B. It is expected that there will be considerably more floor traffic at the new nursery than there is at the other locations.
C. There are no plans to increase the number of people working on the floor of the new nursery once the business has opened.
D. The busiest time for sales at the new nursery is expected to be on the weekends.
E. There will be either two or three managers working at the new nursery at any given time, while only one or two managers work at the existing nurseries at any given time.
Question Type: Weaken
Boil It Down: The old nurseries only have 4 employees each, so the new nursery does not need 6 employees.
Goal: Find the option that best explains why the nursery should hire 6 employees, and not 4 that the consultant recommends.
Analysis:
General comments about weakeners:
Broadly speaking, most arguments that deal with weakeners have issues related to relevance, where the purported evidence or premises are not completely relevant to the conclusion. Correct answer choices will expose this irrelevance.
Thinking about this visually, the correct answer will pull the connection between the premise(s) and conclusion apart, thereby weakening the argument.
For weakeners, there are three common ways to expose the irrelevance of the premises i.e. weaken an argument:
1. Mismatched terms: the conclusion introduces terms or concepts not in the premises
2. Counterexamples/objections: an example where the premises can be true, yet the conclusion does not follow
3. Overlooked possibilities/unintended consequences: An additional factor, possibility, or consequence that the argument did not consider
Now that we have a better idea of how to tackle this question, let’s look at how this argument breaks down:
Argument structure:
(P) = Premise/Evidence/Support (C) = Conclusion
P1: Two existing nurseries each have 4 people (and this was sufficient for the work)
P2: The new building is smaller than the existing nurseries
C: There is no good reason to hire six people for the new nursery
The argument assumes that what is true of the other nurseries will be true of the new nursery. For this weakener, there are overlooked possibilities. The new nursery might be different in significant ways such that the premises or evidence provided are not relevant to the conclusion. The phrase in the argument “There is no good reason” gives a hint that we should look for a good reason i.e. an overlooked possibility.
A. The nursery at the new location will sell the same items that are sold at the two other locations.
Incorrect. This answer choice strengthens the argument by showing that the new location is similar to the other locations. Therefore, the evidence regarding the other locations are relevant to the conclusion and answer choice A tightens the connection between the premises and conclusion.
B. It is expected that there will be considerably more floor traffic at the new nursery than there is at the other locations.
Correct. Answer choice C is an overlooked possibility. The argument overlooked the relevant features about the new nursery which made the new nursery different in significant ways from the other two nurseries. Because of this difference, namely that the new nursery will see more floor traffic, the evidence regarding the other two nurseries is less relevant. In this way, the premises and the conclusion are pulled apart, thereby weakening the argument.
C. There are no plans to increase the number of people working on the floor of the new nursery once the business has opened.
Incorrect. The argument is dealing with whether six employees should be hired for the new facility. Answer choice C does not offer any reason why hiring six employees for the new facility is unjustified. As such, this answer choice fails to weaken the argument.
D. The busiest time for sales at the new nursery is expected to be on the weekends.
Incorrect. The argument is dealing with whether six employees should be hired for the new facility. Whether the weekend is the busiest time for the new nursery has no relevance to whether six employees should or should not be hired. As such, this answer choice cannot weaken or strengthen the argument and thus is irrelevant.
E. There will be either two or three managers working at the new nursery at any given time, while only one or two managers work at the existing nurseries at any given time.
Incorrect. The argument is dealing with whether six employees should be hired for the new facility. Whether those employees are managers or not is not addressed in either the premises or conclusion. Therefore, this answer choice fails to affect the premises or conclusion. As such, this answer choice cannot weaken or strengthen the argument and thus is irrelevant.
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