Logical ReasoningDifficulty: Hard

PT130 S1 Q22 Explanation

When a society undergoes

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

TopicsNecessary Assumption

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Stimulus

When a society undergoes slow change, its younger members find great value in the advice of its older members. But when a society undergoes rapid change, young people think that little in the experience of their elders is relevant to them, and so do not value their advice. Thus, we may measure the amount of deference its younger members show to their elders.

What this question is testing

Necessary Assumption

Your task

Find the assumption the argument requires in order for its conclusion to hold.

Common trap

Answers that would help the argument but aren't strictly required (sufficient, not necessary).

Winning move

Negate each choice — the right one breaks the argument when negated.

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

The question
22.

Which one of the following is an assumption on which the

Answer choices

  1. Out of Scope12% picked this

    A society's younger members can often accurately discern whether that society

    Out of Scope: "young people can discern" The author is claiming that we, who may be young / middle-aged / old, can accurately discern society's rate of change by following his method. He isn't assuming that anyone currently is using his method or that anyone is currently often successful / unsuccessful at gauging the rate of change.

  2. Out of Scope: "practically useful"8% picked this

    How much deference young people show to their elders depends on how much of the elders' experience is

    This is super close, but the concept being used in the evidence is how much value young people find in their elders' advice. We don't discuss how practically useful the advice is. Two distinctions there: something doesn't need to be practically useful to be useful. It's not about how useful the advice actually is; it's about how useful the young people think it is.

  3. Correct68% picked this

    The deference young people show to their elders varies according to how much the young

    Why this is right

    This Links together the concept from the evidence "how much the young value the advice" with the concept from the conclusion "how much deference they show". It is an unnervingly strong Volume Dial style answer, but since the author is thinking we can measure one thing by measuring another thing, he is assuming that one thing varies in accordance with the other.

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

  4. Too Strong9% picked this

    The faster a society changes, the less relevant the experience of older members of the society

    Too Strong: "the more X, the less Y" The author explains that young people think that elders' advice is less relevant in times of faster change. The argument never discusses or cares about whether the advice actually is less relevant. Additionally, this Volume Dial formulation is very strong. It's accusing the author of assuming that if society starts changing 10% faster, then the advice of elders gets 10% less relevant. That's so precise and universal, it's unlikely for any author to commit themselves to such a strong idea.

  5. Too Strong3% picked this

    Young people value their elders' advice just insofar as the elders' experience is practically

    Too Strong: "only value advice for reason X" First of all, this doesn't do anything to deal with our new guy "Deference" in the conclusion. Secondly, the author doesn't need to assume that young people only value the practical usefulness of their elders' advice. It seems like during periods of fast change, young people think that the advice is not relevant and thus don't value it. So we could fix this answer by saying something more like, "The value that young people find in their elders' advice is related to how relevant that advice seems to be to the young people's lives".

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