LSATHacks
  • Explanations
  • Tutoring
  • Courses
  • Login
  • Cart
  • Explanations
  • Tutoring
  • Courses
  • Login
  • Cart
LSAT Explanations › PrepTest 158 › Section 3

Logical Reasoning

PrepTest 158 Section 3

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

25 question explanationsUnscored section

Choose a question

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

  1. Q1:
    In the previous two years, significantly more rain has…Flawed Reasoning

    More rain will probably fall in September than July in Browning.

  2. Q2:
    Educator: Few problems faced in daily life can be solved…Strengthen the Argument

    Schools should require students to take interdisciplinary courses instead of courses in individual disciplines.

  3. Q3:
    Newspaper columnist: What caused the current recession…Identify the Conclusion

    Knowing the cause of the recession is not essential to improve the economy.

  4. Q4:
    Generally, it is important that people practice what they preach…Flawed Reasoning

    People should practice what they preach, with some exceptions.

  5. Q5:
    Domesticated animals, such as dogs, have come into existence…Weaken

    All animals could, theoretically, be domesticated.

  6. Q6:
    Surprisingly, a new study has revealed that shortly after…Paradox

    When it rains in Crystal Bay, pollution levels peak.

  7. Q7:
    Ethicist: This hospital's ethics code states that hospital staff…Weaken

    Dr. Faris is guilty of an ethics violation, even though the medication worked.

  8. Q8:
    Student: My paper was not graded in accordance with…Flawed Reasoning

    The paper was not graded in accordance with the professor's stated criteria.

  9. Q9:
    Consumer advocate: Even relatively minor drug-related interactions…Weaken

    Drug companies should be required to notify consumers of all known drug-related interactions.

  10. Q10:
    Radioactive elements may have been created when the universe…Identify the Conclusion

    Radioactive elements are still being created today.

  11. Q11:
    There is evidence that a certain ancient society burned…Strengthen

    It is likely that the society was still a hunter-gatherer society.

  12. Q12:
    Professor Shanaz: People generally notice and are concerned…Role in Argument

    There is unlikely to be a widespread, grassroots effort for new, more restrictive air pollution controls at this time.

  13. Q13:
    Psychotherapist: The troubles from which a patient seeks relief…Necessary Assumption

    To help a patient heal, a psychotherapist must focus on positive change in the patient's relationships with other people.

  14. Q14:
    Some freelance journalists sell their work to magazines…Parallel Flawed Reasoning

    Some self-respecting journalists are not freelance journalists.

  15. Q15:
    Selling syndicated reruns of a popular network television…Necessary Assumption

    Selling syndicated reruns of a popular network television program while the program is still running can lead to decreased revenues for the network.

  16. Q16:
    If a belief is based on information from a reliable source…Must be True

    If a belief comes from a reliable source, it is reasonable to maintain that belief.

  17. Q17:
    Situation: A physical therapist wants her patients to derive…Parallel Reasoning

    If the therapist meets the first objective (getting her patients to enjoy developing skills), it will lead to the second objective (they will practice more).

  18. Q18:
    Classicist: Our mastery of Latin and Ancient Greek is at best…Role in Argument

    Our mastery of Latin and Ancient Greek is at best imperfect.

  19. Q19:
    For there to be a thriving population of turtles in a pond…Sufficient Assumption

    There must not be a thriving turtle population at Wallakim Pond.

  20. Q20:
    The study of primates is interesting for many reasons…Must be True

    Only primates have opposable thumbs.

  21. Q21:
    Professor: Many scientists hypothesize that there is…Necessary Assumption

    There is no reason to believe that the scientists' "light-absorbing medium" hypothesis is correct.

  22. Q22:
    Some researchers claim that people tend to gesture less…Method of Reasoning

    If rejecting the researchers' claim, it is insufficient to point out that the correlation is far from universal.

  23. Q23:
    According to rational-choice theory, popular support for…Must be True

    Rational-choice theory says that support for various political parties is because individual voters make decisions to support the party that gives them the greatest economic advantages.

  24. Q24:
    Scientist: Some consumer groups claim that the economic…Weaken

    The risk of genetically altered food is minimal.

  25. Q25:
    A government is justified in interfering with a person's action…Principle

About this section

Originally Section 2 of PrepTest 91, administered in May 2020.

Question types

Weaken4 · 16%
Flawed Reasoning3 · 12%
Must be True3 · 12%
Necessary Assumption3 · 12%
Identify the Conclusion2 · 8%
Role in Argument2 · 8%
Method of Reasoning1 · 4%
Paradox1 · 4%
Parallel Flawed Reasoning1 · 4%
Parallel Reasoning1 · 4%
Principle1 · 4%
Strengthen1 · 4%
Strengthen the Argument1 · 4%
Sufficient Assumption1 · 4%

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

Section 2: Logical Reasoning
Section 4: Logical Reasoning
All PrepTest 158 explanations

Hi, I'm Graeme Blake

I scored a 177 on the LSAT. I founded LSATHacks and created the LSAT Mastery Seminars to help students succeed.

I’ve personally written explanations for 5,000+ LSAT questions. If you find these explanations helpful, you'll definitely like our courses.

Join my email list for LSAT study tips and resources.

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Resources

  • Articles
  • Blog
  • Free Email Course
  • LSAT Preptest Converter
  • Experimental Section Checker
  • LSAT Prep Books

About LSATHacks

  • About/Contact
  • Courses
  • Free Trial

Community

  • Discord
  • Social Media
  • Webinars
Disclaimer: Use of these explanations requires official LSAT preptests. LSAT is a registered trademark of LSAC.
LSAC does not review or endorse specific test preparation materials or services and has not reviewed this site.

© Copyright 2026 LSATHacks. All Rights Reserved. | Privacy | Terms