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Difficulty: MediumFlaw in the Reasoning

Acoustics Consultant: In order for a newly constructed concert hall to achieve premier acoustic resonance, the ceiling must incorporate specialized curved timber diffusers. The newly completed Harpswell Auditorium was constructed with specialized curved timber diffusers throughout its main hall ceiling. Therefore, the Harpswell Auditorium is guaranteed to achieve premier acoustic resonance.

The acoustics consultant's reasoning is most vulnerable to criticism on the grounds that the argument

  1. A
    rejects the possibility of premier acoustics by questioning the professional integrity of the auditorium's designers
  2. B
    doubts the factual claim that the auditorium's ceiling panels were properly manufactured
  3. infers that satisfying a necessary prerequisite for achieving an outcome is sufficient to guarantee that outcomeAnswer
  4. D
    treats a subsidiary premise offered in support of the main conclusion as though it were the ultimate conclusion itself
  5. E
    relies on the unwarranted assumption that every acoustic material will always produce flawed sound diffusion

Answer

The argument is flawed because it infers that satisfying a necessary prerequisite for achieving an outcome is sufficient to guarantee that outcome.
The consultant establishes that having specialized curved timber diffusers is a necessary condition ('in order for... must incorporate') for premier acoustic resonance. However, the conclusion infers that meeting this necessary condition is sufficient to guarantee the result. The option stating that the argument infers that satisfying a necessary prerequisite for achieving an outcome is sufficient to guarantee that outcome precisely captures this error.

Step-by-Step Solution

1
Analyze the structure and conditional relationships in the premises
The phrase 'in order for X, Y must occur' introduces a necessary condition: Premier Acoustic Resonance implies Specialized Curved Timber Diffusers.
Identifying the formal logic relationships in the premises is required to evaluate whether the conclusion follows validly.
2
Examine the application to the specific case and the stated conclusion
The premise affirms that Harpswell Auditorium has the required diffusers, and the conclusion claims that premier acoustic resonance is guaranteed.
This shows that the argument affirms the necessary condition to improperly deduce the sufficient condition.
3
Match the identified vulnerability to the corresponding flaw description
The core flaw is treating a required (necessary) condition as a sufficient guarantee.
Accurately abstracting the error identifies the precise description of the reasoning vulnerability.

Key Concept

Conditional Reasoning Flaw: Mistaken Reversal / Confusing Necessary and Sufficient Conditions
Estimated Time:1m 15s
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Topics

Flaw in the Reasoning

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