Logical ReasoningDifficulty: Hard

PT118 S3 Q25 Explanation

Helena: Extroversion, or sociability, is

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

TopicsFlaw

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Stimulus

Helena: Extroversion, or sociability, is not biologically determined. Children whose biological parents are introverted, when adopted by extroverts, tend to be more sociable than who are not adopted.

Jay: Your conclusion does not follow. Some of these children adopted by extroverts remain introverted no matter are when adopted.

What this question is testing

Flaw

Your task

Describe the reasoning error the argument actually commits.

Common trap

Answers that name a real logical flaw the argument doesn't actually make.

Winning move

Articulate the gap in the reasoning yourself, then match it to the choice that describes that 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
25.

Jay’s response suggests that he interpreted Helena’s remarks to

Answer choices

  1. Opposite: play a role3% picked this

    biological factors play only a partial role in a child

    Jay seems to be thinking that Helena was arguing "biological factors don't play a role", because he's rebutting by saying, "Of course they do ... some kids adopted by extroverts remain introverted (because of biology) no matter how exposed they are to that extroverted environment." If Jay thought Helena believed this answer, then Jay's objection wouldn't be an objection.

  2. Opposite18% picked this

    most but not all children whose biological parents are introverted become extroverted when

    This is what Helena is saying. We're looking for Jay's misinterpretation of what she's saying. He is objecting that "not all children whose biological parents are introverted become extroverted when adopted by extroverts ... after all, some children adopted by extroverts remain introverted no matter how young they are when adopted". If he thought that Helena thinks "not all of them become extroverted when adopted" then he wouldn't have said what he said, because it would be agreeing with her, not objecting to her.

  3. Opposite9% picked this

    children whose biological parents are introverted, when adopted by extroverts, tend not to be more sociable than children of introverted

    This is literally Helena's 2nd sentence. This is what she believes. The question is asking what Jay misinterpreted her to be saying.

  4. Correct60% picked this

    biological factors do not play any role in a child

    Why this is right

    Jay's example undermines this claim. Biological factors play no role in a child being extroverted, Helena? Well then --- why to some children adopted by extroverts remain introverted no matter how young they're adopted? Clearly, their biology is keeping them introverted, given that their environmental surroundings are extroverted. Helena, of course, did not make this claim. She is saying that extroversion isn't determined by biology. She isn't saying it isn't affected by biology. We might say, "One's political affiliation is not determined by one's religion", thinking that a Christian isn't necessarily going to be a Republican. An atheist isn't necessarily going to be a Democrat. But that's not the same as saying, "One's political affiliation is not influenced by one's religion". We might still think that one's religion can have a big impact on one's likely political affiliation.

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

  5. Opposite10% picked this

    environmental factors can sometimes be more influential than biological factors in

    This is Helena's point. We don't want an answer that sounds like what Helena actually said. We want an answer that sounds like what Jay misinterpreted her to be saying.

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