Logical ReasoningDifficulty: Hard

PT135 S2 Q7 Explanation

Gotera: Infants lack the motor

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

Gotera: Infants lack the motor ability required to voluntarily produce particular sounds, but produce various babbling sounds randomly. Most children are several years old before they can voluntarily produce most of the vowel and consonant sounds of their language. We can conclude that speech than a process that is abstract or mental.

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
7.

Which one of the following is an assumption required by

Answer choices

  1. Correct62% picked this

    Speech acquisition is a function only of one's ability to produce the sounds

    Why this is right

    This bridges the gap between SA → PS speech acquisition and producing the sounds of spoken language.

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

  2. Too Strong24% picked this

    During the entire initial babbling stage, infants cannot intentionally move their tongues while

    There’s no reason infants cannot intentionally move their tongues while they are babbling. It must be assumed that they cannot move their tongues enough to intentionally produce particular sounds, but to say they cannot move their tongues at all while they are babbling goes too far.

  3. Too Strong2% picked this

    The initial babbling stage is completed

    It is implied that the initial babbling phase occurs during infancy, but it need not be completed during infancy.

  4. Irrelevant Relationship6% picked this

    The initial babbling stage is the first stage of the speech

    The babbling stage and the speech acquisition process need not necessarily be connected.

  5. Weaken5% picked this

    Control of tongue and mouth movements requires a sophisticated level of

    This would undermine the conclusion because it would suggest that mental development cannot be separated from motor control.

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