Logical ReasoningDifficulty: Medium

PT148 S4 Q21 Explanation

Critic: To be a literary classic

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

TopicsMust be True

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Stimulus

Critic: To be a literary classic a book must reveal something significant about the human condition. Furthermore, nothing that is unworthy of serious about the human condition.

What this question is testing

Must be True

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
21.

If the critic's statements are true, which one of the following must

Answer choices

  1. Reversed Logic11% picked this

    Any book worthy of serious study is a

    This answer offers an illegal reversal. This is what we know. Literary ? Reveals something ? worthy classic significant serious study This is what the answer is saying: worthy ? Literary serious study classic

  2. Correct71% picked this

    A book is a literary classic only if it is worthy

    Why this is right

    By connecting the two conditionals, we had this chain: Literary ? Reveals something ? worthy classic significant serious study This answer uses "only if", which always introduces the right side idea, so this conditional would look like this: Literary ? worthy classic serious study We can definitely prove this, since it's just saying, for our chain above, "If you're the 1st thing, then you're the 3rd thing".

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

  3. Contradicted4% picked this

    There are no literary classics worthy of

    From the chain we built by combining the two conditionals, Literary ? Reveals something ? worthy classic significant serious study ... we know that all literary classics are worthy of serious study.

  4. Could Be False6% picked this

    Some books worthy of serious study do not reveal anything significant about

    This definitely could be true, but it also could be false, given our chain. Literary ? Reveals something ? worthy classic significant serious study This answer is saying "in some cases, the 3rd thing is true but the 2nd isn't". That wouldn't violate this chain. It's always possible for the Necessary to be true even though the Sufficient is false. It's possible that some books worthy of serious study are not literary classics and thus don't necessarily reveal anything significant about the human condition. But the paragraph didn't talk about any such books, so we don't have any ammunition to prove that this statement must be true.

  5. Could Be False9% picked this

    Some books that reveal something significant about the human condition are

    This definitely could be true, but it also could be false, given our chain. Literary ? Reveals something ? worthy classic significant serious study This answer is saying "in some cases, the 2nd thing is true but the 1st isn't". That wouldn't violate this chain. It's always possible for the Necessary to be true even though the Sufficient is false. It's possible that some books that reveal something significant are not literary classics. But the paragraph didn't talk about any such books, so we don't have any ammunition to prove that this statement must be true.

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