Free LSAT Practice Question

Question 1 of 1
ID: LSAT-LR-33
Section: Logical Reasoning
Topic: Flaw in the Reasoning
Difficulty level: Medium

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Council Member: Advocates claim that a permanent ban on automobile traffic in the city center would significantly reduce air pollution levels. Yet during the annual "Car-Free Sunday" event last month—when cars were prohibited downtown for an entire day—air quality readings were virtually unchanged from the previous Sunday, when traffic was normal. Therefore, banning cars from the city center will not meaningfully improve air quality.

Which one of the following most accurately expresses a flaw in the council member's reasoning?

AIt assumes, without evidence, that drivers would not switch to equally polluting forms of transportation if cars were banned.

BIt bases a broad conclusion about the effects of a long-term policy on evidence drawn from a single, short-term event.

CIt concludes that a proposed solution is ineffective merely because it would not eliminate every instance of the problem it is intended to address.

DIt mistakes a correlation between automobile traffic and pollution levels for evidence that traffic is the sole cause of air pollution downtown.

EIt overlooks the possibility that pollution levels downtown were already unusually high on both Sundays for reasons unrelated to automobile traffic.

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