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Difficulty: MediumWeakening Arguments

To prevent paper degradation caused by seasonal humidity fluctuations, a municipal historical archive recently installed state-of-the-art automated climate-control units throughout its document vault. Based on laboratory tests showing that constant relative humidity eliminates micro-tearing in centuries-old parchment, the head archivist concluded that installing these units will significantly reduce the archive's overall expenditures on document restoration over the next five years.

Which of the following, if true, most seriously weakens the head archivist's conclusion?

  1. A
    Documents stored in environments with stable relative humidity require far fewer chemical stabilization treatments by professional conservators.
  2. The highly specialized refrigerant and routine maintenance required by the new climate-control units cost more annually than the historical annual expense of repairing paper micro-tears.Answer
  3. C
    Several neighboring regional archives plan to install identical climate-control technology once manufacturing supply chain delays resolve.
  4. D
    Prior to the installation of the units, humidity fluctuations caused a greater percentage of physical document damage than light exposure or handling.
  5. E
    Recent advancements in high-resolution digital scanning have allowed researchers to examine rare manuscripts remotely without handling physical originals.

Answer

The statement showing that the annual operation and maintenance costs of the new climate-control units exceed the historical cost of repairing micro-tears weakens the conclusion.
The conclusion claims that installing the climate-control units will lower total expenditures on document restoration. However, overall expenditure depends on both savings and costs. The correct choice demonstrates that the new maintenance and operational expenses exceed the historical costs of repairing the micro-tears, proving that net expenditures will increase rather than decrease.

Step-by-Step Solution

1
Deconstruct the argument into premise and conclusion
Premise: Automated climate-control units eliminate humidity fluctuations, which cause parchment micro-tearing. Conclusion: Installing these units will reduce overall expenditures on document restoration over the next five years.
Identifying the logical structure isolates the underlying assumption—namely, that the total financial savings from reduced restoration will exceed the costs associated with the new units.
2
Identify the central vulnerability in the financial claim
The conclusion relies on net cost reduction (overall expenditures), but only considers the savings side of the equation while ignoring operational costs.
A argument asserting net savings is vulnerable to evidence showing that new operational or overhead expenses outweigh the savings.
3
Evaluate option choices to find the statement that exposes this vulnerability
The option establishing that ongoing maintenance and specialized refrigerant costs exceed past restoration expenses demonstrates that overall expenditures will rise, not fall.
This directly contradicts the head archivist's claim of reduced expenditures.

Key Concept

Weakening Causal and Financial Feasibility Arguments
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Topics

Weakening Arguments

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