Logical ReasoningDifficulty: Medium

PT131 S2 Q13 Explanation

Bethany: Psychologists have discovered

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

TopicsPrinciple-Strengthen

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Stimulus

Bethany: Psychologists have discovered a technique for replacing one's nightmares with pleasant dreams, and have successfully taught it to adults suffering from chronic nightmares. Studies have found that nightmare-prone children are especially likely to suffer from nightmares as adults. Thus, psychologists should direct efforts toward identifying nightmare-prone the technique for replacing their nightmares with pleasant dreams.

What this question is testing

Principle-Strengthen

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
13.

Which one of the following principles, if valid, most helps to justify drawing the conclusion

Answer choices

  1. Bad Conclusion Match3% picked this

    Psychologists should make an effort to determine why certain children are especially prone to nightmares while

    The author wants the psychologists to find nightmare prone children so that the children can learn this technique, not so that the psychologists can investigate root causes of nightmares.

  2. Reversal15% picked this

    Any psychological technique that can be successfully taught to a child can also be successfully

    It would help us to know that "if it's teachable to an adult, then it's teachable to a child", but this answer reverses that logic.

  3. Correct70% picked this

    Psychologists should do everything they can to minimize the number of adults troubled

    Why this is right

    On a first pass I wouldn't find this super appealing. It doesn't reinforce much wording from the argument core, the way that correct answers on Principle-Justify almost always do. But it certainly strengthens. If psychologists should do everything they can to reduce adult nightmares, they would not only teach it to adults (as they're currently doing), they would also direct some efforts towards finding kids with lots of nightmares, who are more likely to become a source of adult nightmares.

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

  4. Weakens / Opposite4% picked this

    Identifying nightmare-prone children is generally more difficult than teaching adults the technique for replacing nightmares

    This would be a reason not to direct efforts towards finding nightmare prone children

  5. Bad Conclusion Match8% picked this

    Psychologists should not teach the technique for replacing nightmares with pleasant dreams to children who are unlikely to

    The conclusion doesn't say that psychologists should only teach this technique to nightmare-prone children. It just affirms that they should spend some energy trying to find such children and teach them the nightmare-avoidance technique. Saying that you shouldn't teach this technique to people less likely to have nightmares is not any sort of justification for the idea that you should teach this technique to people more likely to have nightmares.

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