Logical ReasoningDifficulty: Easy

PT118 S4 Q3 Explanation

Nylon industry spokesperson: Even though

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

TopicsPrinciple-Strengthen

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Stimulus

Nylon industry spokesperson: Even though cotton and nylon are used for similar purposes, some people have the mistaken notion that cotton is natural but nylon is not. However, nylon’s main components come from petroleum and from the nitrogen in the atmosphere. Clearly the atmosphere in turn comes from ancient plants—a natural source.

What this question is testing

Principle-Strengthen

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
3.

Which one of the following principles, if valid, most helps to justify the nylon

Answer choices

  1. Trap0% picked this

    A substance is unnatural only if the function it serves

  2. Trap0% picked this

    A substance is no less natural than the processes used in

  3. Trap1% picked this

    A substance is no more natural than its least

  4. Trap1% picked this

    One substance can be more natural than another if only one is wholly derived

  5. Correct98% picked this

    A substance is natural if the origins of its main components

    Why this is right

    Answer E is correct.

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

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