Logical ReasoningDifficulty: Hard

PT144 S2 Q24 Explanation

It has been said that authors who

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

TopicsNecessary Assumption

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Stimulus

It has been said that authors who write in order to give pleasure cannot impart to their readers the truth of their subject matter. That claim cannot be true. If it were, one could determine the truthfulness of a book simply by looking at its sales figures. If the book were very least some of what is written in the book is not true.

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
24.

Which one of the following is an assumption required by

Answer choices

  1. Out of Scope10% picked this

    When people choose to read a book, they generally do not already know whether reading it

    Out of Scope: already know Too Strong: generally The author's argument doesn't hinge on any idea like 51% vs. 49% of the time people don't already know when choosing a book whether it'll give them pleasure.

  2. Opposite7% picked this

    Even when an author writes with the goal of giving people pleasure, that goal will

    This would go against the grain of the move the author's argument makes. He goes from talking about authors who intend to give pleasure to talking about books that gave people pleasure. So his interests aren't served by assuming that there is a mismatch sometimes. If we negated this, it would say "when an author writes with the intent of giving pleasure, she always achieves her goal", and that would only strengthen a missing link in this argument.

  3. Out of Scope: concerned with truth9% picked this

    In many cases, a book's readers are unconcerned about the truth of

    Why would the author need it to be true that in many cases a book's readers are un-concerned about the truth of book's contents? Our author is arguing that author who write to give pleasure can still impart truth to their readers. So this answer feels more like a weakening idea than it does something that would be essential to the author's argument.

  4. Correct53% picked this

    A book will not give its readers pleasure unless it was intended by its author

    Why this is right

    On the face of it, this answer sounds way too strong and expansive to be right, but when Necessary Assumption answers are conditional, we can always look at them in diagrammed form and ask ourselves whether the author ever made this move. not intended by author ? won't give readers to give pleasure pleasure It's good to consider the contrapositive as well, since so many answers are disguised in that form. gives readers ? intended by author pleasure to give pleasure The author DID make this move, since her evidence is talking about books that give people pleasure and her conclusion is talking about authors who wrote in order to (with the intent to) give pleasure. The author must be assuming that when she talks about books that give readers pleasure, she's still talking about books intended by the author to give pleasure. Otherwise, her evidence literally says nothing about authors who write in order to give pleasure.

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

  5. Opposite23% picked this

    A book can be popular for reasons other than its ability to

    Our author makes a subsidiary conclusion that if a book is very popular, then one can reasonably conclude that it gave people pleasure. The contrapositive of that would sound like didn't give people pleasure ? not very popular This answer choice is saying that our author assumes that there are times when a book doesn't give pleasure but is still popular. This answer is almost like a counterexample to the link the author is assuming in that last sentence.

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