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Zorluk: OrtaIdentifying Underlying Assumptions

A marine biotechnology firm plans to use thermozyme-X, an enzyme extracted from deep-sea hydrothermal vent archaea, to accelerate industrial plastic recycling. In laboratory tests, thermozyme-X completely degraded unsorted polyolefin plastics at temperatures above 80°C within six hours. The firm concludes that deploying thermozyme-X in commercial recycling facilities will significantly lower overall operational costs compared to conventional sorting and mechanical recycling processes.

Which of the following are assumptions upon which the marine biotechnology firm's argument depends? Select all that apply.

  1. The energy costs required to maintain temperatures above 80°C in commercial facilities will not exceed the financial savings realized from omitting the plastic sorting phase.Cevap
  2. Thermozyme-X does not break down or become inactivated by non-polyolefin contaminants typically present in commercial plastic waste streams.Cevap
  3. C
    Hydrothermal vent archaea are the most abundant source of heat-tolerant plastic-degrading enzymes currently known to marine biologists.
  4. D
    Conventional mechanical recycling processes are incapable of processing polyolefin plastics to the same purity level achieved by enzymatic degradation.
  5. E
    The market price of virgin polyolefin plastics will remain stable following the commercial deployment of thermozyme-X recycling.

Cevap

The argument depends on assuming that energy costs for heating will not exceed savings from eliminating sorting, and that thermozyme-X remains active despite contaminants present in commercial waste streams.
The conclusion asserts that deploying thermozyme-X commercially will reduce overall operational costs compared to conventional methods. This requires two necessary unstated links: first, that the high energy cost of maintaining 80°C heat does not eclipse the money saved by removing the sorting phase; second, that real-world commercial contaminants will not deactivate the enzyme and ruin its cost efficiency. Applying the Negation Test to either of these statements demonstrates that their falsehood completely destroys the firm's cost-saving conclusion.

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1
Identify the main conclusion and premises of the argument.
Premise: In laboratory tests, thermozyme-X degraded unsorted polyolefin plastics at >80°C within 6 hours. Conclusion: Deploying thermozyme-X commercially will significantly lower overall operational costs compared to conventional sorting and mechanical recycling.
Establishing the premise-to-conclusion bridge is essential for identifying unstated necessary assumptions.
2
Apply the Negation Test to candidate assumptions.
Negating the statement regarding energy costs implies that heating expenses will exceed sorting savings, directly invalidating the cost-reduction conclusion. Negating the statement regarding contaminants implies the enzyme will fail in commercial waste environments, rendering it ineffective.
A valid assumption must be logically necessary; if its negation destroys the conclusion, the assumption is required.
3
Evaluate potential scope errors or irrelevant factors in remaining choices.
Statements concerning the relative abundance of source organisms, output purity levels, or virgin plastic market prices fall outside the core economic comparison between processing methods.
Unstated assumptions must fill a critical logical gap rather than introduce tangential or out-of-scope background facts.

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