Free LSAT Practice Question

Question 1 of 1
ID: LSAT-LR-110
Section: Logical Reasoning
Topic: Flaw in the Reasoning
Difficulty level: Hard

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Laundry manager: A load comes out grey only if the wash water was hard or the rinse was short. Every machine on the east bank draws from the softening column, so no load washed there can have had hard water. Three east-bank loads came out grey last week, none of them on our shortest rinse. So a short rinse will turn a load grey even when the water is soft.

Which one of the following most accurately describes a flaw in the manager's reasoning?

AIt settles a question about the east-bank machines by producing the record of the machines on the other bank.

BIt gives no figure for how short a rinse must be before it tells on the colour of a load, nor for how hard the water must be to do the same on a machine that skips the column.

CIt rules out hard water because hard water has never been to blame on those machines, treating an unbroken record as a guarantee.

DFrom a condition without which the loads could not have come out grey it draws a conclusion about what a short rinse will do, which the relation as stated does not settle in that direction.

EIt rests a claim about what a short rinse does on three loads the manager grants were not on the shortest rinse the plant runs, so they are not cases of the practice.

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