Logical ReasoningDifficulty: Medium

PT134 S3 Q20 Explanation

One should not play a practical joke

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

TopicsPrinciple-Strengthen

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Stimulus

One should not play a practical joke on someone if it shows contempt for that person or if one believes it to that person.

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
20.

The principle stated above, if valid, most helps to justify the reasoning in which one of

Answer choices

  1. Not Harming Target of Joke5% picked this

    I should not have played that practical joke on you yesterday. Even if it was not contemptuous, I should have realized that it

    We come closer to establishing the joker thought there would be significant harm, but the rule says the joker has to be worried there will be significant harm to the person on whom the practical joke is being played. What we're told in this answer doesn't clearly indicate that the joker was worried significant harm would come to the target of the joke.

  2. Bad Right Side Match14% picked this

    I have no reason to think that the practical joke I want to play would harm anyone. So, since the joke would show no

    This rule only lets you say you shouldn't play the joke. It has no power to tell you whether you should do it, or whether it wouldn't be wrong.

  3. Correct70% picked this

    Because of the circumstances, it would be wrong for me to play the practical joke I had intended to play on you. Even though

    Why this is right

    This well establishes the 2nd criterion: the author believes that the joke could bring significant harm to the target of the joke.

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

  4. Contempt for Target vs. for Someone6% picked this

    It would have been wrong for me to play the practical joke that I had intended to play on you. Even though I did

    This is similar to the trickiness of (A). The first criterion is about whether the joke shows contempt for the target. This answer only establishes that the joke shows contempt for someone.

  5. Trap5% picked this

    Someone was harmed as a result of my practical joke. Thus, even though it did not show contempt for the person I played the

    Someone harmed vs. Target harmed Belief vs. Result The criterion is about whether the joker believes (ahead of time) that the joke might significantly harm the target. This answer's argument is retroactive regret, not deciding against doing the joke in the first place. We don't know if, at the time of playing the joke, the joker believed it would harm the target. And we don't even know if the joke did harm the target, just that it harmed someone.

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