LSAT 2 | Section 4 | Logical Reasoning: Q18

LR Question 18 Explanation

QUESTION TEXT: Some cleaning fluids, synthetic carpets, wall paneling…

QUESTION TYPE: Must be True

ANALYSIS: We know that the 20 plants eliminated formaldehyde from the air. Presumably it was still being released but the plants absorbed it.

___________

1. If you don’t ventilate a house at all, you will suffocate. There are other reasons for ventilation apart from toxins.
2. We have strong evidence that plants will diminish the concentration of toxins.
3. If the house is in Siberia and has no heat supply it is hard to see how a few plants would help keep it warm. The purpose of insulation in the stimulus is to suggest a poorly ventilated house.
4. CORRECT. The last sentence supports this. If 20 large plants eliminated formaldehyde then a few plants should at least diminish the level of formaldehyde.
5. This is tempting, but we have no evidence that plants slow the release of toxins. They merely absorb toxins.

Recap: The question begins with “Some cleaning fluids, synthetic carpets, wall paneling”. It is a Must be True question. Learn more about LSAT MBT questions in our guide to LSAT Logical Reasoning question types.