Logical ReasoningDifficulty: Hard

PT148 S1 Q19 Explanation

Politician: Of the candidates running

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

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Stimulus

Politician: Of the candidates running, Thompson is the best person to lead this nation. For one thing, Thompson opposes higher taxes whereas the other candidates support them. Many would agree that anyone who opposes leader than someone who supports them.

What this question is testing

Weaken

Your task

Find the choice that makes the argument's conclusion less likely to be true.

Common trap

Answers that look negative but attack a claim the argument never relied on.

Winning move

Find the assumption the argument depends on, then pick the choice that undermines it.

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

The question
19.

Which one of the following, if true, casts the most doubt on

Answer choices

  1. Correct53% picked this

    Opposing higher taxes is not a factor contributing to

    Why this is right

    This is ultimately the strongest of the weakening answers up here. The author presented only one premise in favor of picking Thompson as the best to lead: her oppositional position towards taxes. According to this answer, her opposition to taxes is not a factor (i.e. has zero relevance) when it comes to whether she'd be a good leader. Other than contradicting someone's conclusion, the strongest thing we can do to weaken their argument is kick the legs out from under the premise. If the author's solitary premise is irrelevant to her conclusion, then she currently has no argument!

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

  2. Weaker Impact33% picked this

    Being opposed to higher taxes is not a sufficient condition for

    This does weaken, but not as much as (A). The author presented only one premise in favor of picking Thompson as the best to lead: her opposition towards taxes. According to this answer, her opposition to taxes is not sufficient to prove (i.e. does not by itself guarantee) the conclusion that Thompson would be a good leader. That definitely weakens because it points to the fact that we need to consider other things beyond Thompson's position on taxes. Since (A) and (B) are both attacking the logical force / relevance of the author's premise to her conclusion, we just need to think about which answer choice says something more impactful. Take a real life example; which is a stronger statement: (A) a good LSAT score is not a factor contributing to being accepted at Yale (B) a good LSAT score is not a sufficient condition for being accepted at Yale The 2nd one sound like a true statement! We all know that a good LSAT score does not guarantee you'll be accepted to Yale. But that doesn't diminish the importance of the LSAT score a ton. It just says, "it's not an automatic-in." Meanwhile, the 1st one sounds cuckoo-bananas. An LSAT score isn't a factor in getting accepted to Yale? Why didn't you tell us? (Go to the upper right of your homepage, click on Plans, cancel immediately) So while (B) is saying, "Your premise isn't 100% convincing", choice (A) is saying "Your premise isn't even 1% convincing".

  3. Weaker Impact11% picked this

    Thompson has questionable opinions concerning important issues other

    This does weaken, but not as much as (A). The author presented only one premise in favor of picking Thompson as the best to lead: her opposition towards taxes. But we know there's more to assessing someone's candidacy than that. Even if we prefer Thompson's position on taxes (a highly open question!), what if the other candidates have some advantage over Thompson that we haven't heard about yet? This answer creates a sliver of doubt in that direction, but it doesn't say anything comparative, so it's not actually telling us that "Thompson has more questionable opinions concerning important issues other than taxes". It's only telling us that Thompson has question opinions; the other candidates in the race may also have questionable opinions on those issues. Without this answer clearly establishing a comparative advantage for some other candidate, when it comes to some other issue, this answer only creates the faintest whisper of doubt, like "maybe Thompson's position on some important non-tax issues is more questionable than that of some of her opponents". Meanwhile, (A) completely decimates the one premise the author presented, to the point where the author no longer has any evidence whatsoever.

  4. No Impact4% picked this

    All of the past leaders who supported higher taxes performed their

    If this answer said that past leaders who supported higher taxes were among our best leaders, then it would certainly weaken. But saying they were adequate is very middle of the road, neither strengthening nor weakening the overall comparison between Thompson and her opponents.

  5. No Impact0% picked this

    All of the past leaders who supported higher taxes

    If this answer said that past leaders who supported higher taxes were more hardworking than past leaders who opposed high taxes, then that would somewhat weaken, because it would suggest that there are trade-offs in picking leaders who oppose higher taxes (maybe we prefer their position on taxes but don't like that they are less hardworking than people who support higher taxes). But this doesn't use any comparative language at all. So it's very possible that all past leaders (whether they supported or opposed higher taxes) were hardworking.

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