Logical ReasoningDifficulty: Easy

PT119 S4 Q18 Explanation

Bookstore owner: Consumers should buy

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

TopicsPrinciple-Strengthen

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Stimulus

Bookstore owner: Consumers should buy books only from an independent bookstore, not from a bookstore that belongs to a bookstore chain. An independent bookstore tends to carry a much wider variety of books than does a chain bookstore, so because chains often threaten reduce the variety of books available to consumers.

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
18.

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

Answer choices

  1. Unrelated to Goal5% picked this

    Chain bookstores should not force independent bookstores out of business when doing so would reduce the variety of

    We need a rule about what consumers should / shouldn't do, because that's what our conclusion is talking about. This is a rule about what chain bookstores should / shouldn't do.

  2. Correct80% picked this

    Consumers should buy books from only those bookstores whose existence does not tend to reduce the variety of

    Why this is right

    This combines the value judgment "should" and the relevant ideas "consumers only buying from certain places" from the conclusion with the primary concern of the evidence: the variety of books available to consumers. As a rule, it would look like this: If a bookstore's existence consumers tends to reduce the variety ? should not buy of books available to consumers books there The trigger of this applies to big-chain stores, because the evidence told us that they tend to reduce the variety of books available to consumers. So according to this rule, consumers should not buy from big-chain stores, which supports our conclusion.

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

  3. Bad Conclusion Match11% picked this

    The best interest of the bookselling business is not served when consumers purchase books from businesses whose existence tends to reduce the

    According to this rule, if consumers buy from big-chain stores, then the best interest of the bookselling business is not served. Okay, are we concerned about serving the best interests of the bookselling business? In order for this to support the conclusion, we'd have to imagine our own rule that says "Consumers should not shop in any way that fails serve the best interest of the bookselling business". With (B), we don't have to add any connective tissue to make it work. It provides a rule that lets us derive the actual language of the conclusion.

  4. Out of Scope4% picked this

    Consumers should not make purchases from any bookstore that deliberately forces competing bookstores

    Out of Scope: deliberately Bad Trigger Match This has the right conclusion language, "consumers should not buy from X". But it's trigger doesn't clearly apply to big-chain stores. In order for us to apply this rule to big-chain and derive that consumers should not make purchases from big-chain, we would need to know that big-chain stores "deliberately force competing bookstores out of business". We don't know that. The evidence told us that big-chain stores threaten the existence of competing bookstores, but that's not the same as "deliberately force them out of business".

  5. Bad Conclusion Match0% picked this

    If consumers have no access to any independent bookstore, they should buy books from the chain bookstore with

    This actually contradicts the conclusion, which is saying that consumers should only buy from indies, thus never from big-chain.

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