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Difficulty: HardSingle-Sentence Inferences

Consider the following sentence from a historical analysis of nineteenth-century industrial materials:

"While gutta-percha insulation degraded rapidly when exposed to atmospheric ultraviolet radiation, its chemical stability under hyperbaric oceanic conditions was so exceptional that submerged cable sections recovered after two decades of continuous operation exhibited virtually no dielectric breakdown attributable to ambient seawater exposure."

Based on the sentence above, which of the following can be properly inferred regarding gutta-percha insulation?

  1. Deep-water environmental conditions do not cause rapid degradation of gutta-percha to the same extent that exposure to sunlight above water does.Answer
  2. B
    Gutta-percha was economically superior to synthetic insulation materials available in the late nineteenth century.
  3. C
    Gutta-percha is completely impervious to all forms of chemical deterioration regardless of the duration of submersion.
  4. D
    Exposure to atmospheric ultraviolet radiation was the primary factor causing dielectric breakdown in cables retrieved from the ocean floor.
  5. E
    The rapid rate of atmospheric degradation prevented gutta-percha from being deployed in transatlantic communications cables prior to the late nineteenth century.

Answer

Deep-water environmental conditions do not cause rapid degradation of gutta-percha to the same extent that exposure to sunlight above water does.
The sentence explicitly contrasts two conditions: exposure to atmospheric ultraviolet radiation (which caused rapid degradation) and exposure to hyperbaric oceanic conditions (which resulted in virtually no dielectric breakdown over twenty years). It logically follows that deep-water conditions do not cause rapid degradation to the same degree that sunlight above water does.

Step-by-Step Solution

1
Analyze the structural contrast in the target sentence.
Identified a contrast marker ('While...') comparing atmospheric exposure (ultraviolet radiation) with underwater exposure (hyperbaric oceanic conditions).
Single-sentence inference questions rely on strict logical deductions grounded in clause relationships.
2
Evaluate the specific factual claims made for each environment.
Atmospheric UV radiation caused rapid degradation, whereas two decades of hyperbaric seawater exposure produced virtually no dielectric breakdown.
Determines the factual boundaries of what must be true.
3
Deduce the valid logical conclusion.
Submerged oceanic conditions are far less damaging to gutta-percha than above-ground atmospheric UV exposure.
Matching the direct comparative inference without bringing in outside assumptions.

Key Concept

Single-Sentence Logical Inference
Estimated Time:2m 0s
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Topics

Single-Sentence Inferences

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