Logical ReasoningDifficulty: Easy

PT159 S1 Q23 Explanation

During last year’s flu season no one who was vaccinated

A free, expert breakdown of this official LSAT Logical Reasoning question.

TopicsParallel

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Full official LSAT questions are available through LawHub. This page provides LSAT Lab's explanation, strategy, and review tools without republishing the full official question.

Stimulus

During last year’s flu season no one who was vaccinated contracted the flu. This year every student at South High School has been vaccinated. So this flu season none High School will contract the flu.

What this question is testing

Parallel

Your task

Break the argument into its conclusion and evidence, then do exactly what the question stem asks with that structure.

Common trap

Answers that sound relevant to the topic but don't connect to the argument's actual reasoning.

Winning move

Predict what a right answer must do, then test each choice against the conclusion-evidence gap.

Reading along? Open the full official question in LawHub — we show a fragment here and keep the reasoning in our own words.

The question
23.

Which one of the following arguments is most similar in its reasoning to

Answer choices

  1. Correct79% picked this

    No camper who used insect repellent last month was disturbed by mosquitoes. Since everyone in our campsite has applied insect repellent tonight, none of

    Why this is right

    Answer A is correct.

    Skill tested: Parallel · how this choice captures the argument's function is the move to repeat next time.

  2. Trap4% picked this

    Last year, Marie purchased a car that had been well maintained. Since Marie will certainly continue to maintain the car this year, the car

  3. Trap12% picked this

    Last year, no student with perfect attendance failed a class, and all students in advanced history had perfect attendance. So no student in advanced

  4. Trap3% picked this

    All the fruit we purchased yesterday was fresh. All the fruit we bought yesterday is in the refrigerator. Therefore, all the fruit

  5. Trap3% picked this

    No sparrow eats seeds with hard shells. All seeds of this tree have hard shells. So no sparrow will eat

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