Logical ReasoningDifficulty: Easy

PT137 S2 Q25 Explanation

Principle: Only if a professor

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

TopicsPrinciple-Strengthen

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Stimulus

Principle: Only if a professor believes a student knowingly presented someone else's ideas without attribution should the professor make an official has committed plagiarism.

Application: It is not the case that Professor Serfin should make an official determination that Walters committed plagiarism in the term paper about wrote for Serfin's class.

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, if true, justifies the above application of

Answer choices

  1. Too Weak14% picked this

    Professor Serfin does not have completely compelling evidence to conclude that Walters presented someone else's ideas as if they were his own in

    We want to know as strongly as possible that Prof S didn't think that Walters had knowingly presented other people's ideas. This says that Prof S doesn't have completely compelling evidence for that, but she still may believe it. I don't have completely compelling evidence that there's life on other planets, but I still believe there is.

  2. Unrelated to Goal4% picked this

    If Walters had realized that the main thesis of his term paper is identical to the main thesis of a book he had read,

    All we care about is whether or not Prof S believed that Walters knowingly presented someone else's ideas as though they were his. This doesn't tell us anything about what Prof S believes.

  3. Correct80% picked this

    Although the main thesis of Walters's term paper is identical to that of a book that he did not cite, Professor Serfin is convinced

    Why this is right

    This firmly establishes that "Prof S did not believe that Walters knowingly presented someone else's ideas as his own." The although part of this answer is a meaningless stall / distraction, hoping to hide from us the main clause, where we get the one fact we're seeking.

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

  4. Unrelated to Goal1% picked this

    Walters does not believe that Professor Serfin should make an official determination

    All we care about is what Prof S believes about Walters. This answer is about what Walters believes.

  5. Unrelated to Goal / Too Weak1% picked this

    Professor Serfin has no intention of making an official determination that Walters plagiarized

    In order to apply the principle, we need to know whether Prof S believes that Walters did / didn't try to knowingly pass off someone else's ideas as his. This answer doesn't give us any information about whether Prof S believes that. If we were to speculate that "since Prof S isn't planning to make an official determination, that probably means that Prof S doesn't think Walters knowingly plagiarized", we would have no way to say that this speculative inference is stronger than (C) flat out telling us that Prof S doesn't think W knowingly plagiarized.

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