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Difficulty: MediumDistinguishing Inferences from Assumptions and Speculations

Consider the following passage:

'An economic survey of municipal utility providers in 2025 established that every utility that integrated grid-scale battery storage unit Model X achieved a grid reliability rating exceeding 98 percent. Furthermore, during that year, no municipal utility provider that achieved a grid reliability rating exceeding 98 percent experienced forced load-shedding events during peak summer hours.'

True or False: The assertion 'Municipal utility providers that integrated grid-scale battery storage unit Model X in 2025 reduced their long-term operational maintenance expenses' is a valid logical inference directly supported by the passage.

Answer: Answer

Answer

False. The assertion represents an unwarranted speculation rather than a valid logical inference because the passage contains no information regarding operational maintenance expenses.
On GMAT Critical Reasoning, a valid inference must strictly follow from the stated premises without requiring additional unstated assumptions. The passage links battery storage Model X to high grid reliability ratings and zero load-shedding events. It contains no information regarding maintenance costs or financial expenses. Claiming that expenses were reduced is an extrapolation beyond the passage's scope, making the statement false.

Step-by-Step Solution

1
Analyze the stated premises in the passage.
Premise 1: Battery storage Model X integration implies grid reliability rating > 98%. Premise 2: Grid reliability rating > 98% implies zero forced load-shedding events.
Establishing the scope of factual premises isolates what can be strictly deduced.
2
Evaluate the target assertion against the scope of the premises.
The target assertion claims that utility providers reduced their long-term operational maintenance expenses.
A valid GMAT inference must be strictly 'Must Be True' based solely on the given premises without requiring outside assumptions.
3
Distinguish between a valid inference and an unstated assumption/speculation.
Because maintenance expenses are never mentioned or logically entailed by grid reliability ratings or load-shedding data, assuming a cost reduction is speculative.
Plausible real-world connections cannot substitute for direct textual proof on Critical Reasoning inference items.

Key Concept

Distinguishing Valid Inferences from Unwarranted Speculations
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Distinguishing Inferences from Assumptions and Speculations

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