Logical ReasoningDifficulty: Easy

PT21 S3 Q20 Explanation

The argument proceeds by

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

TopicsMethod

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Stimulus

A number of seriously interested amateur astronomers have tested the new Exodus refractor telescope. With it, they were able to observe in crisp detail planetary features that were seen only as fuzzy images in their 8-inch (approximately 20-centimeter) Newtonian telescopes, even though the 8-inch telescopes, with their wider apertures, gather more light the Exodus if she or he is buying a telescope for planetary observation.

What this question is testing

Method

Your task

Describe how the argument proceeds — the technique it uses to reach its conclusion.

Common trap

Answers that describe a method the argument doesn't actually use.

Winning move

Track the role each statement plays, then match that to the choice describing the same moves.

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The question
20.

The argument proceeds

Answer choices

  1. Trap2% picked this

    evaluating the credibility of claims made by a

  2. Trap8% picked this

    detailing the ways in which a testing situation approximates the conditions

  3. Trap1% picked this

    placing a phenomenon in a wider context in order to

  4. Correct89% picked this

    supporting a recommendation to a group on the basis of the experience of a subset

    Why this is right

    Answer D is correct.

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

  5. Trap1% picked this

    distinguishing between the actual reasons why a certain group did a particular thing and the best reasons

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