Logical ReasoningDifficulty: Easy

PT120 S1 Q14 Explanation

Linguist: Regional dialects, many of

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

TopicsNecessary Assumption

Keep going in LSAT Lab

  • Save & drill this skill build targeted practice sets from questions like this one

  • Video walkthroughs watch every question solved step by step

  • 81 official LSATs as questions, timed sections & full-length tests

Full official LSAT questions are available through LawHub. This page provides LSAT Lab's explanation, strategy, and review tools without republishing the full official question.

Stimulus

Linguist: Regional dialects, many of which eventually become distinct languages, are responses by local populations to their own particular communicative needs. So even when the unification of the world economy forces the adoption of a universal language itself will inevitably develop many regional dialects.

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
14.

Which one of the following is an assumption that the linguist’s

Answer choices

  1. Too Strong6% picked this

    No two local populations have the same communicative needs as

    Too Strong: all are unique Doesn't Mention New Concept The author is definitely assuming that "not all local populations have the same needs", because she assumes that different local populations will have different, particular needs. But she doesn't need to assume that "no local populations have the same needs". If we negate this answer and say, "hey, author, there are at least two local populations that have the same communicative needs as each other", that won't hurt the author. She'll just say, "Sure. But there are many local populations that don't have the same communicative needs as each other, and that's why there will be many regional dialects created".

  2. Out of Scope: engage in trade3% picked this

    In some regions of the world, at least some people will not engage in international trade after the

    The author's argument doesn't hinge at all on any given amount of people who do / don't engage in trade. If we negate this, it will be saying, "Every single person in the world will engage in international trade once the world economy unifies". That doesn't hurt the author's argument at all. She can say, "Yup, everyone will be engaged in international trade, but there will be local populations with particular communicative needs so the universal trade language will develop some regional dialects.

  3. Trigger-Support Too Strong: unless3% picked this

    A universal language for use in international trade will not arise unless the world

    Any time the conclusion is a conditional claim, we will never be ... - strengthening by suggesting that the trigger is likely to happen - weaken by suggesting that the trigger is unlikely to happen - assuming that the trigger will happen In other words, just accept the trigger. Worry about the outcome. If we see that this answer's language is completely wrapped up in the internal language of the trigger, there's no way it's performing the Evidence to Conclusion link we want. Suppose I say, "When rising sea levels from global warming force Miami residents to head inland, Orlando will be the primary place they go." Am I assuming that, "Miami residents will not head inland, unless global warming causes rising sea levels"? Of course not. They may go inland because of a hurricane, or because the real estate in Miami gets too expensive. Our author is implying that a unified world economy would be sufficient to force the adoption of a universal language, but she doesn't imply that a unified world economy is required for a universal language to be adopted.

  4. Out of Scope: eradicated4% picked this

    When the unification of the world economy forces the adoption of a universal language for use in international trade, many regional dialects

    This argument doesn't need to assume that any regional dialects are eradicated. It's only claiming that many new regional dialects will be created. (You don't have to destroy an old one to create a new one)

  5. Correct84% picked this

    After the unification of the world economy, there will be variation among many different local populations in their

    Why this is right

    If we wanted to look at this formally, the conclusion is claiming this logic path: Unified economy many with universal - - - - - - - - - - - - - - > regional trade language dialects The evidence provided this much. responses to many particular local - - > regional communic needs dialects The answer is addressing this missing link. Unified economy responses to with universal ---> particular local trade language communic needs

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

Continue the review in LSAT Lab

Save this question, watch the video walkthrough, and drill similar questions in your LSAT Lab account.

LSAT Lab

Turn this review into a targeted study plan.

Save this question, drill more like it, watch the video walkthrough, and track your progress in your LSAT Lab account.

Start practicing free