Logical ReasoningDifficulty: Easy

PT21 S3 Q5 Explanation

Since Professor Smythe has been

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

TopicsFlaw

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Stimulus

Since Professor Smythe has been head of the department, the most distinguished member of the faculty has resigned, fewer new courses have been developed, student enrollment has dropped, and the reputation of the department has gone down. Smythe was appointed to undermine the department.

What this question is testing

Flaw

Your task

Describe the reasoning error the argument actually commits.

Common trap

Answers that name a real logical flaw the argument doesn't actually make.

Winning move

Articulate the gap in the reasoning yourself, then match it to the choice that describes that 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
5.

The reasoning in the argument is flawed because

Answer choices

  1. Bad Premise / Conclusion Match1% picked this

    overlooks the fact that something can have the reputation for being of poor quality without

    This answer choice would apply to an argument that said, "X has a reputation for being poor quality. Thus, X is poor quality." That bears no resemblance to our argument: "Since X came on the scene, bad stuff happened. Thus, X came on the scene in order to make bad stuff happen."

  2. Not Sampling7% picked this

    bases a general claim on a few

    This refers to one of the 10 famous flaws, Sampling, in which an author relies on a sample that is too small, unrepresentative, or skewed in some other way. The conclusion here is not a general claim. It's a specific claim about Prof S and the department.

  3. Correct89% picked this

    assumes that because an action was followed by a change, the action was undertaken to

    Why this is right

    If an answer says, "the author assumes that because X, Y", then X should match the evidence and Y should match the conclusion or the assumption that feeds into the conclusion. Do we have "an action followed by a change"? Sure, the action of appointing Prof S head of the department was followed by several changes (the top faculty person resigned, fewer new courses are developed, enrollment dropped, reputation has gone down). Does the conclusion act like "the appointing of Prof S as head of the department" was undertaken to bring about all those bad changes we just listed? Yes! The conclusion uses an infinitive, "to undermine". Infinitives convey a sense of purpose or intent. We can say "Just because the comedian's joke was followed by an audience member sobbing, we can't say that the comedian made that joke in order to make the audience member start crying." Or in this case, "Just because all those negative changes followed Prof S's appointment, that doesn't mean that Prof S's appointment was done in order to bring about those negative changes."

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

  4. Not an Objection1% picked this

    fails to distinguish between a decline in quantity and a decline

    Among the four negative things mentioned, there is both a decline in quantity (fewer new courses / fewer students enrolled) and a decline in quality (most distinguished faculty resigned / reputation has gone down). This answer choice would be addressing an argument that sounds like, "Drake used to put out 10 songs a year. Now he only puts out 5 songs a year. Clearly, Drake's songs are getting worse." Our objection to the Smythe argument is, "Just because there has been a decline in quantity and quality since Smythe was appointed to the department, that doesn't show that people appointed Smythe in the hopes of having those declines."

  5. Not Circular2% picked this

    presupposes what it purports to

    This refers to one of the 10 famous flaws, Circular Reasoning, in which the premise restates the conclusion or assumes the truth of the conclusion. All these mean Circular: - premise restates the conclusion - presupposes what it purports to establish - assumes what it sets out to prove - presumes the truth of the conclusion This argument's premise is distinct from its conclusion. It's not a restatement or an idea that necessitates believing the conclusion, so we can't call this a circular argument.

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