Logical ReasoningDifficulty: Easy

PT122 S1 Q17 Explanation

Sharon, a noted collector of

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

TopicsPrinciple-Strengthen

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Stimulus

Sharon, a noted collector of fine glass, found a rare glass vase in a secondhand store in a small town she was visiting. The vase was priced at $10, but Sharon knew that it was worth at least $1,000. Saying nothing to the storekeeper about the value of the vase, Sharon bought accused Sharon of taking advantage of him, Sharon replied that she had done nothing wrong.

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
17.

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

Answer choices

  1. Bad Conclusion Match3% picked this

    A seller is not obligated to inform a buyer of anything about the merchandise that the seller offers for sale

    We need an answer that helps us conclude the buyer wasn't obligated to inform the seller of the real value of the merchandise. This answer is about the seller not being obligated to inform the buyer of something.

  2. Bad Evidence Match15% picked this

    It is the responsibility of the seller, not the buyer, to make sure that the amount of money a buyer gives a seller in

    This answer shifts responsibility from the buyer to the seller, which lines up with our conclusion that the buyer isn't responsible for telling the seller how much his goods are worth. But this answer does not line up with the facts of the case. The seller charged $10 and the buyer paid $10. The dispute isn't about the amount paid not matching the amount charged. The dispute is about the amount paid not matching the actual value of the merchandise.

  3. Correct81% picked this

    A buyer’s sole obligation to a seller is to pay in full the price that the seller demands for a piece of merchandise that

    Why this is right

    If the buyer's only obligation is to pay what the seller asks, which Sharon did, that absolves her of any wrongdoing that the seller is accusing her of. This answer is a little tricky because it doesn't use the same language as the judgement in the conclusion: it doesn't talk about right or wrong. But, if we have only one responsibility and we fulfill that responsibility, that implies that we held up our end of the bargain and didn't wrong the other party in the transaction.

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

  4. Bad Conclusion Match1% picked this

    It is the responsibility of the buyer, not the seller, to ascertain that the quality of a piece of

    We need a principle that supports the judgment that the buyer did nothing wrong, This answer shifts responsibility from the seller to the buyer, which is the opposite of what we'd expect a right answer to do. It also focuses on ascertaining the quality of the merchandise, which is an out of scope idea.

  5. Out of Scope: well acquainted0% picked this

    The obligations that follow from any social relationship between two people who are well acquainted override any obligations that follow from an

    This principle is limited to people who are well acquainted. We don't have any evidence that Sharon and the seller are well acquainted, so this principle doesn't apply to them.

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