Consider the following argument: To preserve its historical archives, a municipal library plans to store its entire collection of 19th-century paper maps in sealed, low-humidity desiccant vaults. The chief archivist claims that because high ambient humidity significantly accelerates cellulose hydrolysis in paper, maintaining ultra-low moisture levels in these vaults will completely prevent further degradation of the map collection.
True or False: The archivist's argument depends on the assumption that environmental factors other than humidity, such as light exposure or airborne acids, are not independently causing ongoing paper degradation in the collection.
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True. The statement represents a necessary unstated assumption for the argument.
The statement is true because the archivist asserts that low humidity will 'completely prevent further degradation.' If other unaddressed factors like light exposure or airborne pollutants independently cause paper degradation, humidity control alone cannot achieve complete prevention. Applying the Negation Test shows that if other factors do independently cause degradation, the conclusion fails.
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Negation Test for Unstated Assumptions