Logical ReasoningDifficulty: Hard

PT101 S2 Q25 Explanation

The publisher of a best-selling

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

TopicsPrinciple-Strengthen

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Stimulus

The publisher of a best-selling self-help book had, in some promotional material, claimed that it showed readers how to become exceptionally successful. Of course, everyone knows that no book can deliver to the many what, by definition, must remain limited to the few: exceptional success. Thus, although it is doing so should not be considered unethical in this case.

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
25.

Which one of the following principles, if valid, most strongly supports the

Answer choices

  1. Correct69% picked this

    Knowingly making a false claim is unethical only if it is reasonable for people to accept

    Why this is right

    Only if = right side idea, so this conditional looks like this Knowingly making it's reasonable false claim X ? for people to is unethical accept X as true We always want our conclusions on the right side of the arrow, so if we contrapose this, we'll get that: if it's not reasonable knowingly for people to accept ? claiming X claim X as true not unethical Is the trigger applicable to our situation? Yes! It's not reasonable for people to accept the claim that "this book will show readers how to be exceptionally successful" because everyone knows that no book can deliver that promise. The trigger applies to our situation, and the outcome matches our conclusion. What more could a girl hope for?

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

  2. Bad Conclusion Match5% picked this

    Knowingly making a false claim is unethical if those making it derive a gain at the expense of those acting as

    If = left side idea, so this conditional looks like this those falsely claiming X knowingly derive a gain at the ? claiming X expense of those is unethical acting like X is true The trigger is actually irrelevant to us. As soon as we see that the outcome is the opposite of our conclusion, we know that this rule is useless to us.

  3. Bad Trigger Match5% picked this

    Knowingly making a false claim is unethical in only those cases in which those who accept the claim as true suffer a hardship greater

    Only = right side idea, so just like (A), we would contrapose so that the outcome of the conditional looks like the conclusion. if those accepting X knowingly as true suffer a hardship ? making false greater than the gain claim X is they were anticipating not unethical The outcome matches our conclusion. Is the trigger applicable to our situation? Were we told that people who bought this book while believing it really would show them how to be exceptionally successful will suffer a hardship greater than the gain they were anticipating? We were not. And it seems unlikely that the trigger would apply to these book buyers. After all, the gain they were anticipating (if they believed the hype) is exceptional success. That's a huge gain! Is the hardship they suffer from finding out the book is not life-changing greater than that? Is it a huge, life-changing hardship? No, it's just a waste of $20.

  4. Bad Trigger Match17% picked this

    Knowingly making a false claim is unethical only if there is a possibility that someone will act as if

    Only if = right side idea, so just like (A) and (C), we would contrapose so that the outcome of the conditional looks like the conclusion. there is no possibility knowingly that someone will act ? making false as if the claim claim X is might be true not unethical The outcome matches our conclusion. Is the trigger applicable to our situation? Were we told that there is no possibility that someone will act as if this book really will show them how to become exceptionally successful? No, we weren't. All we know is that everyone should know that this is a false claim. We can better establish the trigger of (A), because that's just saying "it would be unreasonable for someone to act like this claim is true". We can't establish that "nobody will act like this claim is true", since humans are famous for acting irrationally or unreasonably some of the time.

  5. Bad Conclusion Match5% picked this

    Knowingly making a false claim is unethical in at least those cases in which for someone else to discover that the claim is false,

    Like (B), this is a rule that would allow us to prove, in certain cases, that knowingly making a false claim is unethical. It has no power to prove in any cases that knowingly making a false claim isn't unethical.

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