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Zorluk: OrtaNecessary vs. Sufficient Condition Flaws

Art Historian: A successful restoration of a Renaissance fresco requires the use of historically accurate pigments. The recent restoration of the Da Vinci piece in the local chapel utilized pigments precisely matched to the 15th-century originals. Therefore, the restoration of the chapel's fresco will undoubtedly be considered a success.

The reasoning in the art historian's argument is most vulnerable to criticism on the grounds that the argument does which of the following?

  1. treats a condition that is required for a certain outcome as if it were sufficient to guarantee that outcomeCevap
  2. B
    infers that a restoration process as a whole is successful merely on the basis that a specific component of the restoration was successful
  3. C
    takes for granted that if a condition is sufficient to produce a given result, the absence of that condition guarantees the absence of the result
  4. D
    illicitly shifts the meaning of the term 'successful' over the course of the reasoning
  5. E
    concludes that one event causes another event simply because the two events are frequently observed together

Cevap

The correct answer is the option that states the argument treats a condition that is required for a certain outcome as if it were sufficient to guarantee that outcome.
The author explicitly states that historically accurate pigments are a requirement (a necessary condition) for a successful restoration. However, the author then concludes that because this single necessary condition was met in the chapel's restoration, the restoration is guaranteed to be a success. This incorrectly treats a necessary condition as a sufficient one, effectively concluding that a requirement is the only thing needed for success.

Adım Adım Çözüm

1
Identify the primary premise and the conditional relationship it establishes.
Premise: Successful Restoration -> Historically Accurate Pigments. (Accurate pigments are a necessary condition).
The word 'requires' indicates that historically accurate pigments are necessary for a successful restoration.
2
Identify the secondary premise.
Premise: The chapel restoration utilized historically accurate pigments.
This establishes that the necessary condition was fulfilled in a specific instance.
3
Identify the conclusion.
Conclusion: The chapel restoration will be considered a success.
The author infers that the outcome must occur because the requirement was met.
4
Compare the conclusion to the logical constraints of the premises.
The argument commits an illegal reversal. It assumes that meeting a necessary requirement (pigments) is enough to guarantee the outcome (success).
Fulfilling a necessary condition never guarantees a result; there could be many other requirements (e.g., proper technique, suitable climate) needed for a successful restoration.

Anahtar Kavram

Necessary vs. Sufficient Condition Flaws (Illegal Reversal)
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