Logical ReasoningDifficulty: Easy

PT107 S3 Q6 Explanation

Astorga’s campaign promises are

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

TopicsNecessary Assumption

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Stimulus

Astorga’s campaign promises are apparently just an attempt to please voters. What she says she will do if elected mayor is simply what she has learned from opinion polls that voters want the new mayor to do. Therefore, voters intends to do if she becomes mayor.

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
6.

Which one of the following is a questionable assumption on which the

Answer choices

  1. Out of Scope: capable5% picked this

    If she is elected mayor, Astorga will not be capable of carrying out the campaign

    The argument is about Intent, not results / capacity / feasibility. The author doesn't have to assume that Astorga is incapable of following through on her campaign promises. He might believe that she's perfectly capable of following through on the promises, but just doesn't plan to because she's not willing to pursue those ends.

  2. Out of Scope: inaccurate poll5% picked this

    The opinion polls on which Astorga’s promises are based do not accurately reflect what voters want the

    The author didn't indicate any skepticism of the opinion polls. He may well believe that the opinion polls correctly reflect the voters' actual wishlist, but still believe that Astorga has no plans to actually follow through on these campaign promises (she's just telling voters what they want to hear in order to get elected).

  3. Out of Scope1% picked this

    Most voters are unlikely to be persuaded by Astorga’s campaign promises to vote for her

    Out of Scope: whether people vote for her Too Strong: most The argument is only about whether Astorga's intent matches her current rhetoric. The argument isn't affected one way or the other by whether Astorga wins or loses the election, so the author doesn't need to assume anything about what votes she'll receive or not receive. Furthermore, the word/concept of "most" will be wrong on Necessary Assumption 99.5% of the time we see it. When you negate "most" you're basically saying, "Nuh-uh, author. It's not true that at least 51% of voters are unlikely to be persuaded. It's at most 49%." No argument is every badly weakened by switching from "at least 51%" to "at most 49%", so negating "most" will basically never weaken.

  4. Too Strong: no strong opinions8% picked this

    Astorga has no strong opinions of her own about what the new mayor ought to

    The author doesn't need to assume that Astorga sought out opinion polls because she has no strong opinions of her own. She may well have strong opinions but still seek opinion polls to see how well they align with the strong opinions of voters. Furthermore, she may have strong opinions of what she thinks the new mayor ought to do, while still hiding those opinions and just telling the voters what they want to hear. So negating this, and saying "she does have at least one strong opinion" wouldn't weaken the argument at all.

  5. Correct81% picked this

    Astorga does not actually intend, if elected, to do what she has learned from the public opinion polls that voters want

    Why this is right

    This just establishes the difference that the author was assuming. Astorga is telling voters that she'll do the things she knows they want the mayor to do. The author believes that voters aren't hearing what she'll really do. So the author is assuming that she won't really do the things she knows they want the mayor to do. If we negated this answer, we'd get, "Astorga actually does intend, if elected, to do [the things she's currently telling voters that she intends to do]", which would badly weaken the argument by essentially contradicting the conclusion.

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

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