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LSAT Explanations › PrepTest 108 › Section 3

Logical Reasoning

PrepTest 108 Section 3

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

26 question explanationsScored section

Choose a question

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

  1. Q1:
    Despite the best efforts of journalists …Necessary Assumption – EXCEPT

    It's crucial that editors review journalists' work to detect and remove biases, in order to make reporting as objective as possible.

  2. Q2:
    Astronomer: Mount Shalko is the perfect site …Weaken

    Mount Shalko is the perfect location for the observatory.

  3. Q3:
    The local fair held its annual photography contest …Paradox – EXCEPT

    Both amateurs and professionals entered the contest.

  4. Q4:
    The average 40-year-old North American …Sufficient Assumption

    TV ads have influenced North American habits of thought.

  5. Q5:
    Researchers have developed a membrane …Flawed Reasoning

    Oxygen-removing fridges will be way less expensive than current models long-term.

  6. Q6:
    Shortly after the power plant opened …Paradox – EXCEPT
  7. Q7:
    The existing works of ancient literature …Strengthen

    The surviving ancient works aren't the most original works produced in ancient times.

  8. Q8:
    A metaphor is the application of a word or phrase …Identify the Conclusion

    Not all uses of language are metaphorical.

  9. Q9:
    In a recent poll of chief executive officers …Flawed Reasoning

    Top management of large corporations are not indifferent to employees.

  10. Q10:
    Many people joke about Friday the thirteenth …Weaken

    A lot of people would rather disrupt their travel plans than risk flying on an unlucky day (Friday the 13th).

  11. Q11:
    The everyday behavior of whales …Necessary Assumption

    Using trained sea lions with cameras will allow biologists to study whales' everyday behavior.

  12. Q12:
    Geologist: A geological fault in the mountain …Strengthen

    We shouldn't put the nuclear waste facility under this mountain until scientists check whether the mountain has geological faults.

  13. Q13:
    Mall manager: By congregating in large groups …Method of Reasoning
  14. Q14:
    Wu: Jurgens is dishonest and so should not be …Flawed Parallel Reasoning
  15. Q15:
    A survey of historians shows that most …Flawed Reasoning

    These historians neglect many important sources of historical knowledge.

  16. Q16:
    To act responsibly in one's professional capacity …Principle – Application
  17. Q17:
    Radial keratotomy (RK), a surgery that is designed to …Paradox – EXCEPT

    RK is supposed to eliminate needing glasses or contacts.

  18. Q18:
    Chelas and Stelma are required to leave their respective stations …Must Be False

    If a prisoner attempts to escape, Chelas and Stelma must leave immediately to pursue.

  19. Q19:
    Faden: Most of our exercise machines …Flawed Reasoning
  20. Q20:
    Sarah: Reporters, by allotting time to some events …Point at Issue
  21. Q21:
    Advertisement for a lactase supplement …Weaken

    At least 50 million people in North America should take lactase supplements.

  22. Q22:
    Jim: I hear that the company is considering giving …Principle – Justify
  23. Q23:
    Commentator: A political constitution that provides …Most Strongly Supported

    Constitutions have to be interpreted to deal with new situations.

  24. Q24:
    Only if a family manages its finances wisely …Parallel Reasoning

    (A or C) → (B or D)

    The conclusion simply combines the two sufficient conditions and the two necessary conditions with ORs.

  25. Q25:
    Anthropologist: After mapping the complete dominance hierarchy …Method of Reasoning
  26. Q26:
    Anthropologist: After mapping the complete dominance hierarchy …Point at Issue

About this section

Originally Section 3 of PrepTest C, administered in February 2000.

Question types

Flawed Reasoning4 · 15%
Paradox – EXCEPT3 · 12%
Weaken3 · 12%
Method of Reasoning2 · 8%
Point at Issue2 · 8%
Strengthen2 · 8%
Flawed Parallel Reasoning1 · 4%
Identify the Conclusion1 · 4%
Most Strongly Supported1 · 4%
Must Be False1 · 4%
Necessary Assumption1 · 4%
Necessary Assumption – EXCEPT1 · 4%
Parallel Reasoning1 · 4%
Principle – Application1 · 4%
Principle – Justify1 · 4%
Sufficient Assumption1 · 4%

Based on our explanation classifications. Each of the 26 questions is counted once.

Section 2: Logical Reasoning
Section 4: Reading Comprehension
All PrepTest 108 explanations

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