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Zorluk: ZorParallel Valid Structure

If a geological stratum features extensive iridium anomalies, it must have been exposed to extraterrestrial impact debris. Any stratum exposed to extraterrestrial impact debris will exhibit widespread microtektite deposits. Since the newly excavated Tyra Formation exhibits no microtektite deposits, it cannot feature extensive iridium anomalies.

Which of the following arguments exhibits a logical structure most similar to that of the argument above?

  1. A
    If a geological stratum is formed during intense volcanic activity, it contains high levels of basalt. Any stratum containing high levels of basalt cools very slowly over time. The Vulcan Formation cooled very slowly over time, so it must have been formed during intense volcanic activity.
  2. If a synthetic polymer is treated with argon gas, it becomes completely nonporous. Any synthetic polymer that is completely nonporous resists chemical degradation. The newly synthesized compound Zeta does not resist chemical degradation, so it must not have been treated with argon gas.Cevap
  3. C
    If a municipal government raises property taxes, residential development slows down. Any slowdown in residential development results in decreased school enrollment. Therefore, if a municipal government does not raise property taxes, it will not experience decreased school enrollment.
  4. D
    If a marine ecosystem suffers from severe coral bleaching, its biodiversity sharply declines. Any marine ecosystem with sharply declining biodiversity loses its apex predators. This reef has lost its apex predators, which means it must have suffered from severe coral bleaching.
  5. E
    If an applicant possesses an advanced degree, they usually command a higher starting salary. Anyone who commands a higher starting salary is placed in a senior management role. Since John is not placed in a senior management role, he must not possess an advanced degree.

Cevap

The argument concluding that compound Zeta must not have been treated with argon gas accurately mirrors the logical structure of the stimulus.
The original argument relies on a valid chain of conditional statements (A implies B, and B implies C) followed by the denial of the final necessary condition to deny the initial sufficient condition (Not C, therefore Not A). The correct option follows exactly this pattern: treatment with argon (A) guarantees being nonporous (B), which guarantees resisting degradation (C). Denying the resistance to degradation (Not C) validly concludes the lack of argon treatment (Not A).

Adım Adım Çözüm

1
Map the logical structure of the stimulus.
The stimulus establishes a chain: Condition A (iridium) guarantees Condition B (extraterrestrial debris), and Condition B guarantees Condition C (microtektites). It then introduces a scenario where Condition C is absent (Not C) and validly concludes that Condition A must also be absent (Not A).
Identifying the formal abstract structure (A -> B, B -> C, Not C -> Not A) is required to find an exact parallel.
2
Evaluate the options for exact structural match and logical validity.
The correct answer must feature a valid chain of two conditionals followed by an application of modus tollens (denying the consequent) across the entire chain.
Parallel reasoning questions require matching the exact type of premises, conclusion, and validity status.
3
Eliminate distractors containing logical flaws or unmatched quantifiers.
Exclude options that use illegal negation (Not A -> Not C), illegal reversal (C -> A), mismatched quantifiers ('usually'), or those that rely merely on similar subject matter.
Distractors in these questions frequently utilize identical topics or identical premise structures but conclude with a classic formal logic fallacy.

Anahtar Kavram

Parallel Valid Structure (Chain Conditionals and Modus Tollens)
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Konular

Parallel Valid Structure

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