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LSAT Explanations › PrepTest 151 › Section 3

Logical Reasoning

PrepTest 151 Section 3

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

25 question explanationsScored section

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

  1. Q1:
    Researchers put two electrodes in a pool …Most Strongly Supported

    Researchers created a weak electric field when a dolphin swam near electrodes.

  2. Q2:
    In a study of honesty conducted in various retail stores …Evaluate the Argument

    Most people who received extra change behaved dishonestly.

  3. Q3:
    Dario: The government should continue to grant patents …Point At Issue
  4. Q4:
    There are only two possible reasons that it would be wrong …Sufficient Assumption

    It's not wrong to do mining operations on Mars.

  5. Q5:
    A person with low self-esteem will be treated disrespectfully more often …Complete the Argument
  6. Q6:
    Watanabe: To protect the native kokanee salmon …Principle – Strengthen
  7. Q7:
    If rational-choice theory is correct, then people act only …Flawed Reasoning

    Rational-choice theory is wrong.

  8. Q8:
    Winds, the movement of gases in the atmosphere of a planet …Paradox

    Winds are caused by temperature differences.

  9. Q9:
    Until recently it was widely believed that only a limited number …Flawed Reasoning

    More species can reproduce through parthenogenesis now than before.

  10. Q10:
    Physician: Clinical psychologists who are not also doctors …Principle – Justify

    Psychologists who don't have medical degrees shouldn't be allowed to prescribe psychiatric medication.

  11. Q11:
    Lobbyist: Those who claim that automobile exhaust emissions …Flawed Parallel Reasoning

    Exhaust emissions aren't a risk to public health.

  12. Q12:
    A recently discovered fossil, which is believed by some to come from …Sufficient Assumption

    The fossil doesn't prove that birds evolved from dinosaurs.

  13. Q13:
    A new screening test has been developed for syndrome Q …Flawed Reasoning

    Justine has syndrome Q.

  14. Q14:
    Music historian: In the past, radio stations would not play rock songs …Most Strongly Supported

    Radio stations used to refuse to play rock songs longer than 3 minutes.
    * Some musicians said this limit restricted creativity.
    * Some critics claim rock only became truly artistic after that barrier was removed.
    * Once the limit was lifted, structure broke down because the styles rock came from weren't well-suited to longer songs.

  15. Q15:
    Some food historians conclude that recipes compiled by …Method of Reasoning

    The conclusion (that Apicius' recipes indicate how wealthy Romans ate) is hasty.

  16. Q16:
    Wood that is waterlogged or desiccated can be preserved …Most Strongly Supported

    Wood usually disintegrates within 100–200 years, unless unusually preserved.
    * Because of this, few remains of early wheeled vehicles survive.
    * Archaeologists have found small ceramic models of those vehicles from the same period.
    * These models survive much better than the real vehicles.
    * As a result, most evidence about early wheeled vehicles comes from the models.

  17. Q17:
    Traditional hatcheries raise fish in featureless environments …Necessary Assumption

    Fish raised in experimental hatcheries are more likely to survive after release.

  18. Q18:
    An analysis of the language in social media messages posted via the …Flawed Reasoning

    A person's mood is happy in the morning, declines during the day, and improves in the evening.

  19. Q19:
    Economist: The wages of many of the lowest-paid corporate employees …Necessary Assumption

    A maximum wage law would help protect the wages of many lowest-paid corporate employees from cuts.

  20. Q20:
    The level of triglycerides in the blood rises when …Weaken

    Increased triglyceride levels contribute to heart disease.

  21. Q21:
    In an experiment, some volunteers were assigned to take …Necessary Assumption

    Aerobic exercise helps the body handle stress.

  22. Q22:
    Insurers and doctors are well aware that the incidence of lower-back injuries …Weaken

    Office equipment and furniture aren't designed to promote workers' health.

  23. Q23:
    Researchers have found that some unprotected areas outside of a national park …Paradox

    The park was designed to protect birds.

  24. Q24:
    A recent poll of a large number of households found that 47 percent …Flawed Reasoning

    People with university degrees are more likely to live with a cat than a dog.

  25. Q25:
    Keeler wanted the institute to receive bad publicity …Parallel Reasoning

    Keeler notified the press.

About this section

Originally Section 3 of PrepTest 85, administered in September 2018.

Question types

Flawed Reasoning5 · 20%
Most Strongly Supported3 · 12%
Necessary Assumption3 · 12%
Paradox2 · 8%
Sufficient Assumption2 · 8%
Weaken2 · 8%
Complete the Argument1 · 4%
Evaluate the Argument1 · 4%
Flawed Parallel Reasoning1 · 4%
Method of Reasoning1 · 4%
Parallel Reasoning1 · 4%
Point At Issue1 · 4%
Principle – Justify1 · 4%
Principle – Strengthen1 · 4%

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

Section 2: Logical Reasoning
Section 4: Logical Reasoning
All PrepTest 151 explanations

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