Logical ReasoningDifficulty: Hard

PT147 S1 Q17 Explanation

Politician: Over the next decade

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

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Stimulus

Politician: Over the next decade, our city will be replacing all of its street signs with signs that are designed for improved readability. But since no one is complaining about the current signs, colossal waste of time and money.

What this question is testing

Evaluate

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
17.

Which one of the following would be most useful to know in evaluating

Answer choices

  1. Unclear Impact12% picked this

    What features of the new street signs improve the readability of

    In order to answer this in a way that would weaken, we would need to think of really cool, desirable features that improve readability, so that we could argue that, "even though no one is complaining about the current signs, when they see these new ones, with the LED lettering and anti-glare glaze on the bulbs, they are going to think this was not a waste of time / money!" It would be hard for us to come with a feature that would have a common sense link of, "If street signs had feature X for enhancing readability, then people would think it worth spending money on that improvement". So it's not easy to think of an answer here that clearly weakens the argument.

  2. Doesn't Lend Itself to an Objection21% picked this

    Are the new street signs considerably more expensive to manufacture than the current

    If we say YES to this question, then it would strengthen the argument. But does saying NO to this weaken the argument? If this were a weaken question, would we pick an answer that said, "The new street signs are not considerably more expensive to manufacture than the current street signs were"? No, we wouldn't. It's a very weak objection: It's not a colossal waste of money. After all, the new ones are only somewhat more expensive to make than the old ones were. The author would say, "Right, but the current ones are fine. As I said, no one is complaining about them. So the entire purchase (not just the extra cost above and beyond what the originals cost) is a waste of money."

  3. Correct64% picked this

    What percentage of its street signs does the city replace annually in the course

    Why this is right

    We could weaken this argument by saying that, for example, 10% of the street signs are replaced annually in the course of ordinary maintenance. Over the course of a decade (10 years), that means that 100% of the street signs would be replaced anyway, even if we didn't use these new ones. We're already sending a crew out to each sign to take it down and replace it with a new sign. So it might as well be replaced with these new, more readable signs. It's not a colossal waste of time and money to replace all our current signs with these new ones, over the next decade. After all, we replace 10% of them each year no matter what, so over the next decade they're all getting replaced either way. Thus this plan doesn't represent any extra time, and the only extra money would be whatever extra we pay for these new signs vs. buying a new version of the existing signs.

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

  4. Doesn't Lend Itself to an Objection1% picked this

    Do any other cities plan to replace their street signs with signs designed

    If this were a weaken question, would it hurt the argument to say, "Other cities plan to replace their street signs with ones that have improved readability"? Not really. It's a very weak objection: It's not a colossal waste of money. After all, other cities are doing it. The author could say, "Right, other cities are dumb and are wasting their time and money. Also, it might be the case that in those cities people are complaining about the current street signs, unlike here."

  5. Doesn't Lend Itself to an Objection1% picked this

    Were experts consulted when the new street signs

    Can we weaken the argument by saying, It's not a colossal waste of money. After all, experts were consulted when the new street signs were designed. No. The author would just say, "Great, then you wasted time and money hiring these consultants, too."

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