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LSAT Explanations › PrepTest 159 › Section 3

Logical Reasoning

PrepTest 159 Section 3

Find the question you’re working on. Explore the reasoning, understand each answer, and learn from your mistakes.

25 question explanationsScored section

Choose a question

Explanations for every question, find them by number or text.

  1. Q1:
    Critic: While the political message in this short story …Principle Justify

    The political message should not have been included in the story.

  2. Q2:
    Entertainment reporter: Unlike most major motion pictures …Necessary Assumption

    Escapade 2's distributors chose to avoid doing anything that could reduce interest in the movie.

  3. Q3:
    Anthropology professor: The new class I'm offering has been listed …Point at Issue
  4. Q4:
    Toy manufacturer: Our competitors argue that we should withdraw …Flawed Reasoning

    The competitor's argument doesn't merit serious attention.

  5. Q5:
    Researcher: Some scholars maintain that the first government …Sufficient Assumption

    The scholars who claim Massachusetts was the first government after China to issue paper currency are incorrect.

  6. Q6:
    A tiny crab that lives 550 meters below the surface …Weaken

    The crab probably hunts bioluminescent prey.

  7. Q7:
    Last year a local advertising agency produced many of its television …Paradox

    The ads from this agency had improper sound and some viewers even complained.

  8. Q8:
    Sinking large, obsolete pieces of equipment in coral areas …Role in Argument

    The practice might be bad ecologically even if it provides habitats for marine life.

  9. Q9:
    Having cameras at traffic intersections to automatically ticket …Weaken

    Red-light cameras don't make intersections safer.

  10. Q10:
    For years, Glenville had the highest apartment rents in the …Flawed Parallel Reasoning

    Renting an apartment in Glenville is cheaper now than it was before.

  11. Q11:
    The crocodiles of Lake Victoria, in East Africa, sometimes attack …Paradox

    The number of humans attacked by crocodiles has increased significantly, even though the number of crocodiles and food availability has stayed the same.

  12. Q12:
    When the annual period of daylight saving time begins …Strengthen

    Sleep deprivation probably causes the rise in accidents the day after daylight savings.

  13. Q13:
    Every human's brain contains a mental representation of the …Identify the Conclusion

    The brain's representation of the world necessarily leaves out many details.

  14. Q14:
    Generally, open discussion of a false and pernicious idea …Principle

    Certain misconceptions can become more popular, not less, when they are openly discussed.

  15. Q15:
    Schmidt: In enforcing township rules on how homeowners maintain …Flawed Reasoning
  16. Q16:
    Some have argued that once it becomes necessary for us to think …Role in Argument

    The suggested criterion for ascribing beliefs and desires to computers is flawed.

  17. Q17:
    Manufacturer: If our biggest competitor were to go out of business …Sufficient Assumption

    Our biggest competitor must stay in business for us to stay in business.

  18. Q18:
    Jack's dog howls whenever a train goes by …Parallel Reasoning

    Jack's dog sometimes howls while he's washing it.

  19. Q19:
    When plants are growing quickly, they take more carbon dioxide …Most Strongly Supported

    Fast growth makes plants a net carbon sink.

  20. Q20:
    Essayist: Since ancient times humans have relied on myths …Identify the Conclusion

    Science falls short of complete truth.

  21. Q21:
    Sodium nitrate is frequently added to sausages to make them pink …Flawed Reasoning

    Sodium nitrate should never be added to sausages.

  22. Q22:
    For a zoo to make a valuable contribution to the community …Must Be True

    If a zoo makes a valuable contribution, it must be well run.

  23. Q23:
    Principal: All of our school's rural students participate …Flawed Reasoning

    Some participants in extracurriculars are rural and some are urban.

  24. Q24:
    Principle: An author of an article that has appeared in a magazine …Principle – Application
  25. Q25:
    Paleontologist: Most biologists accept that birds evolved from …Flawed Reasoning

    The reasoning of the biologists who reject the theory is misguided.

About this section

Originally Section 1 of the April 2025 LSAT, administered in April 2025.

Question types

Flawed Reasoning5 · 20%
Identify the Conclusion2 · 8%
Paradox2 · 8%
Role in Argument2 · 8%
Sufficient Assumption2 · 8%
Weaken2 · 8%
Flawed Parallel Reasoning1 · 4%
Most Strongly Supported1 · 4%
Must Be True1 · 4%
Necessary Assumption1 · 4%
Parallel Reasoning1 · 4%
Point at Issue1 · 4%
Principle1 · 4%
Principle Justify1 · 4%
Principle – Application1 · 4%
Strengthen1 · 4%

Based on our explanation classifications. Each of the 25 questions is counted once.

Section 2: Reading Comprehension
Section 4: Reading Comprehension
All PrepTest 159 explanations

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