Logical ReasoningDifficulty: Easy

PT133 S1 Q16 Explanation

A survey of address changes

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

TopicsStrengthen

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Stimulus

A survey of address changes filed with post offices and driver's license bureaus over the last ten years has established that households moving out of the city of Weston outnumbered households moving into the city two to one. Therefore, we can expect that next year's census, which counts all residents Weston has declined since the last census ten years ago.

What this question is testing

Strengthen

Your task

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

Common trap

Answers that are consistent with the argument but add no real support, or that strengthen a claim the argument doesn't make.

Winning move

Locate the gap between evidence and conclusion, then pick the choice that closes 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
16.

Which one of the following, if true, most helps strengthen

Answer choices

  1. Too Weak2% picked this

    Within the past decade many people both moved into the city and also moved

    This fails to indicate whether the number of people moving out of Weston is greater or less than the number of people moving in to Weston.

  2. Out of Scope2% picked this

    Over the past century any census of Weston showing a population loss was followed ten years later by a

    This is a descriptive statement about what has happened in the past, which may be nothing like the current changes occurring in Weston. Even if it were assumed that what happened in the past will continue to happen in the future and that the last census in Weston showed a population loss, this would only weaken the argument by suggesting that the next census would should a population gain.

  3. Weaken5% picked this

    Many people moving into Weston failed to notify either the post office or the driver's license bureau that they

    This would make it less likely that next year’s census will show that the population of Weston has declined.

  4. Correct88% picked this

    Most adults moving out of Weston were parents who had children living with them, whereas most adults remaining in or moving into the city

    Why this is right

    This prevents the case described during the evaluation of the argument and makes it more likely that the population of Weston has declined.

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

  5. Out of Scope2% picked this

    Most people moving out of Weston were young adults who were hoping to begin a career elsewhere, whereas most adults remaining in or moving

    The motivation provided by a job to move into or out of Weston has no relevance to whether those adults brought any children (or other family members) along with them.

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