Logical ReasoningDifficulty: Medium

PT21 S3 Q6 Explanation

Books about architectural works,

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

TopicsNecessary Assumption

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Stimulus

Books about architectural works, unless they are not intended for a general audience, ought to include discussions of both the utility and the aesthetic appeal of each of the buildings they consider. If they do not, they are flawed. Morton’s book on Italian Baroque palaces describes these palaces’ functional aspects, but fails ceiling that is one of the truly breathtaking masterpieces of Western art.

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
6.

If the statements above are true, it would be necessary to establish which one of the following in order to conclude that

Answer choices

  1. Unrelated to Goal3% picked this

    Morton’s description of the palaces’ utility

    We’re looking to hear that Morton’s book was intended for a general audience. No part of the rule dealt with whether or not descriptions are accurate.

  2. Unrelated to Goal7% picked this

    Morton’s book does not discuss aspects of the palaces other than utility

    We’re looking to hear that Morton’s book was intended for a general audience. No part of the rule dealt with discussing things other than utility and aesthetic appeal.

  3. Correct72% picked this

    Morton’s book is intended for a

    Why this is right

    We are trying to use the rule provided that allows us to prove that a book is flawed. In order to do so we need to know that book is about architectural works, intended for a general audience, and fails to either talk about utility or aesthetic appeal for at least one of the buildings considered. We were told that Morton’s book is about architectural works and fails to talk about the aesthetic appeal of at least one building it considered. But we hadn’t yet been told that the book was intended for a general audience.

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

  4. Unrelated to Goal3% picked this

    The passage discussing the palace plays a very important role in helping to establish the overall

    We’re looking to hear that Morton’s book was intended for a general audience. We don’t care whether the palace in question plays an important role or a minor role. We only care whether utility and aesthetic appeal were covered for each building discussed.

  5. Unrelated to Goal15% picked this

    The palace discussed at length is one of the most aesthetically important of those treated

    We’re looking to hear that Morton’s book was intended for a general audience.We don’t care whether the palace we heard about is one of the most aesthetically important in the book, or whether it’s the 20th most important.

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