easy · LSAT Logical Reasoning
Either the north valve or the south valve caused the pressure loss, but not both. Inspection cleared the north valve. Therefore, replacing the south valve will restore pressure.
Which one of the following, if assumed, enables the conclusion to be properly drawn?
- A cleared valve can never fail in the future.
- Pressure briefly returned to normal during the valve inspection.
- The south valve is more expensive than the north valve.
- Pressure losses sometimes have several simultaneous causes.
- Replacing whichever valve caused the loss restores pressure.
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