Free LSAT Practice Question

Question 1 of 1
ID: LSAT-LR-53
Section: Logical Reasoning
Topic: Flaw in the Reasoning
Difficulty level: Medium

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Researcher: If a water sample contains more than 10 micrograms of lead per liter, drinking that water is unsafe. This rural well tested at only 4 micrograms of lead per liter, so drinking the well water is clearly safe for residents.

The reasoning in the researcher's argument is flawed in that the argument

Aconfuses a quantitative measurement with a qualitative judgment about safety

Bassumes without justification that residents will drink the same amount of water as was tested

Ctakes a condition that is sufficient to make drinking water unsafe and treats that condition as necessary for the water to be unsafe

Dfails to consider the possibility that other contaminants in the well water could also endanger health

Econcludes that the laboratory measurement is certainly accurate even though it could be affected by sampling error

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