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LSAT Explanations › PrepTest 135 › Section 4

Logical Reasoning

PrepTest 135 Section 4

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:
    When a forest is subject to acid rain, the calcium…Paradox

    Acid rain lowers calcium levels in the soil.

  2. Q2:
    Syndicated political columnists often use their newspaper…Necessary Assumption

    Columnists rarely persuade voters.

  3. Q3:
    Travel industry consultant: Several airlines are increasing…Weaken

    Airlines should focus on making economy class seats more comfortable.

  4. Q4:
    Gaby: In school, children should be allowed fully to…Point At Issue
  5. Q5:
    Judge: The case before me involves a plaintiff and…Principle

    The judge will not order that defendants can be questioned without their codefendants or their codefendants’ legal counsel.

  6. Q6:
    The calm, shallow waters of coastal estuaries are…Must Be True

    Sewage can fill estuaries with nutrients.

  7. Q7:
    The ruins of the prehistoric Bolivian city of Tiwanaku…Evaluate The Argument

    Archaeologists think the stones were transported on reed boats. 

  8. Q8:
    Union member: Some members of our labor union are…Flawed Reasoning

    We shouldn’t strike now.

  9. Q9:
    Birds and mammals can be infected with West Nile virus…Most Strongly Supported

    Birds and mammals can only catch West Nile from mosquito bites.

  10. Q10:
    In trying to reduce the amount of fat in their diet…Paradox

    Those who reduced red meat the most eat more fat than those who didn’t reduce.

  11. Q11:
    Rolanda: The house on Oak Avenue has a larger…Flawed Reasoning

    The house on Oak Avenue isn’t the best one to rent.

  12. Q12:
    The best jazz singers use their voices much as horn…Role in Argument

    Jazz is mostly hornlike voices and voicelike horns.

  13. Q13:
    Educator: Reducing class sizes in our school district…Necessary Assumption

    Smaller classes probably wouldn’t improve education.

  14. Q14:
    Geographer: Because tropical storms require heat and…Identify The Conclusion

    The prediction is wrong. Global warming probably won’t cause more storms.

  15. Q15:
    Copyright was originally the grant of a temporary…Strengthen

    Copyright sometimes goes beyond its original purpose.

  16. Q16:
    Critic to economist: In yet another of your…Method of Reasoning

    The economist says his advice was correct.

  17. Q17:
    Watching music videos from the 1970s would give the…Parallel Reasoning

    1970’s music videos weren’t representative of the music at the time.

  18. Q18:
    Hospitals, universities, labor unions, and other institutions…Principle

    Organizations can be good even if their individual members are selfish.

  19. Q19:
    Consumer advocate: In some countries, certain produce…Weaken – Exception

    There are reasons to avoid irradiated foods.

  20. Q20:
    When teaching art students about the use of color…Necessary Assumption

    Art teachers should use colored paper rather than paint to teach color.

  21. Q21:
    Philosopher: To explain the causes of cultural…Role in Argument

    Social scientists need data from several societies to explain cultural phenomena.

  22. Q22:
    Scientist: Physicists claim that their system of…Strengthen

    Physicists should copy biologists and increase anti-fraud protections.

  23. Q23:
    Biologist: Researchers believe that dogs are the…Necessary Assumption (principle)

    Some dogs come from more recently domesticated wolves.

  24. Q24:
    Paleomycologists, scientists who study ancient forms of…Flawed Parallel Reasoning

    Professor Mansour must be a paleomycologist.        

    M ➞ PM

  25. Q25:
    Lutsina: Because futuristic science fiction does not…Point At Issue
  26. Q26:
    Because our club recruited the best volleyball players…Flawed Reasoning

    Our team will almost certainly win the city championship.

About this section

Originally Section 4 of PrepTest 65, administered in December 2011.

Question types

Flawed Reasoning3 · 12%
Necessary Assumption3 · 12%
Paradox2 · 8%
Point At Issue2 · 8%
Principle2 · 8%
Role in Argument2 · 8%
Strengthen2 · 8%
Evaluate The Argument1 · 4%
Flawed Parallel Reasoning1 · 4%
Identify The Conclusion1 · 4%
Method of Reasoning1 · 4%
Most Strongly Supported1 · 4%
Must Be True1 · 4%
Necessary Assumption (principle)1 · 4%
Parallel Reasoning1 · 4%
Weaken1 · 4%
Weaken – Exception1 · 4%

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

Section 3: Reading Comprehension
All PrepTest 135 explanations

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