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Zorluk: ZorWeakening Arguments

A major commercial airline plans to retrofit its long-haul passenger fleet with lightweight carbon-fiber seating frames to reduce overall aircraft weight and lower fuel expenditures over the next five years. Management reasons that because jet fuel represents over thirty percent of total operating expenses, achieving a ten percent reduction in cabin weight will generate substantial net financial savings, even after accounting for the initial capital costs of purchasing and installing the new seats.

Which of the following, if true, most seriously undermines the reasoning behind the airline management's plan?

  1. The carbon-fiber seating frames require specialized bi-annual structural inspections and maintenance that cost significantly more than the monetary value of the projected fuel savings.Cevap
  2. B
    Global jet fuel prices are projected to increase steadily over the next five years, raising the monetary value of every gallon of fuel saved.
  3. C
    Competing airlines that adopted flight-route optimization software achieved greater overall reductions in fuel consumption than those achieved through cabin weight modifications.
  4. D
    Passengers surveyed regarding long-haul flights indicated that cushion comfort and legroom are far more important to their satisfaction than an airline's fuel efficiency efforts.
  5. E
    A ten percent reduction in total cabin weight does not noticeably decrease the runway takeoff distance required by fully loaded long-haul aircraft.

Cevap

The argument is most seriously weakened by demonstrating that specialized bi-annual structural inspections and maintenance for the carbon-fiber seats will cost significantly more than the projected fuel savings.
The airline's conclusion rests on the financial calculation that reducing fuel consumption will produce net savings after paying for the initial installation of the seats. Showing that recurring maintenance and inspection costs for these specific seats exceed the monetary value of the fuel saved directly contradicts the assumption of net savings, invalidating management's reasoning.

Adım Adım Çözüm

1
Deconstruct the core argument
Premise: Carbon-fiber seats reduce cabin weight by 10%, lowering fuel usage. Fuel is >30% of operating costs.
Conclusion: The retrofit plan will generate substantial net financial savings over 5 years despite initial installation costs.
Identifying the explicit premises and conclusion reveals the logic gap.
2
Identify the key unstated assumption
The author assumes that there are no additional hidden or ongoing costs associated with carbon-fiber seats that will exceed the projected fuel savings over the 5-year timeframe.
Weakening questions targeting cost-benefit plans frequently rely on unstated operational or maintenance costs.
3
Evaluate the options for logical impact
The statement regarding bi-annual maintenance costs explicitly shows that recurring expenses will exceed the monetary value of fuel saved, rendering net savings impossible.
Directly breaking the financial feasibility premise shatters the conclusion.

Anahtar Kavram

Feasibility and Net Impact in Plan-Based Arguments
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Weakening Arguments

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