Logical ReasoningDifficulty: Hard

PT138 S4 Q22 Explanation

One of the most useful social conventions

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

TopicsSufficient Assumption

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Stimulus

One of the most useful social conventions is money, whose universality across societies is matched only by language. Unlike language, which is rooted in an innate ability, money is an artificial, human invention. Hence, it seems occurred independently in more than one society.

What this question is testing

Sufficient Assumption

Your task

Find the assumption that, if added, guarantees the conclusion follows.

Common trap

Answers that only partly bridge the gap, leaving the conclusion unproven.

Winning move

Identify the new term in the conclusion and pick the choice that links it to the evidence.

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

The question
22.

The argument's conclusion is properly drawn if which one of the following

Answer choices

  1. Correct58% picked this

    Some societies have been geographically isolated enough not to have been influenced by

    Why this is right

    This rules out the alternative explanation and ensures that the invention of money occurred independently in more than one society.

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

  2. Too Weak11% picked this

    Language emerged independently in different societies at different times in

    The argument draws a distinction between language and money in that language is rooted in innate ability, while money is a human invention.

  3. Supports a Premise22% picked this

    Universal features of human society that are not inventions are rooted

    This supports the premise that money is a human invention, but stops short of establishing that the invention of money occurred independently in more than one society.

  4. Supports a Premise6% picked this

    If money were not useful, it would not be

    This supports the premise that money is useful, since the argument establishes that the use of money is widespread.

  5. Out of Scope4% picked this

    No human society that adopted the convention of money has since

    Whether money, once adopted, has been abandoned says nothing about the circumstances under which the adoption of money occurred.

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