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Zorluk: OrtaFlaw in the Reasoning

Museum Curator: Over the past decade, the percentage of bronze artifacts in our collection requiring extensive structural restoration has steadily decreased, while the percentage of marble artifacts requiring such restoration has significantly increased. Therefore, our preservation team is currently performing extensive structural restorations on a larger number of marble artifacts than bronze artifacts.

The reasoning in the museum curator's argument is most vulnerable to criticism on the grounds that the argument:

  1. draws a conclusion about comparative absolute quantities based solely on information about comparative proportionsCevap
  2. B
    presumes, without providing adequate justification, that a change in the restoration rate for bronze artifacts caused the change in the restoration rate for marble artifacts
  3. C
    fails to distinguish between a condition that is necessary to demonstrate an increase in restorations and a condition that is sufficient to demonstrate it
  4. D
    relies on a shifted definition of the term 'extensive structural restoration' between the premises and the conclusion
  5. E
    mistakes a subsidiary conclusion about the changing percentages of artifact preservation for the argument's final, main conclusion

Cevap

The argument draws a conclusion about comparative absolute quantities based solely on information about comparative proportions.
The correct answer accurately diagnoses the vulnerability in the curator's reasoning. The curator attempts to compare the absolute number of marble restorations to the absolute number of bronze restorations using only percentage changes. If the museum owns thousands of bronze artifacts and only a handful of marble artifacts, a shrinking percentage of bronze artifacts could still easily outnumber a growing percentage of marble artifacts.

Adım Adım Çözüm

1
Identify the premises of the argument.
The percentage of bronze artifacts needing restoration is decreasing, and the percentage of marble artifacts needing restoration is increasing.
Understanding the evidence provided is the first step in analyzing the argument's structure.
2
Identify the main conclusion of the argument.
The museum is currently restoring a larger number (absolute quantity) of marble artifacts than bronze artifacts.
Pinpointing the conclusion reveals what the author is trying to prove based on the premises.
3
Evaluate the logical connection between the premises and the conclusion.
The premises discuss percentages (rates), while the conclusion attempts to make a definitive claim about absolute numbers.
This exposes the logical gap. Percentages alone cannot determine absolute numbers without knowing the total baseline sizes of the respective groups.
4
Select the option that accurately describes this specific logical gap.
The option stating the argument draws a conclusion about absolute quantities based solely on comparative proportions perfectly captures the flaw.
This matches the classic 'percent vs. number' flaw archetype.

Anahtar Kavram

Flaw in the Reasoning - Percentages vs. Numbers
Tahmini Süre:1m 30s
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Flaw in the Reasoning

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