Logical ReasoningDifficulty: Hard

PT120 S1 Q21 Explanation

Opposition leader: Our country has

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

TopicsParallel Flaw

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Stimulus

Opposition leader: Our country has the least fair court system of any country on the continent and ought not to be the model for others. Thus, our highest court is the least fair of not to be emulated by other countries.

What this question is testing

Parallel Flaw

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
21.

The flawed reasoning in which one of the following arguments is most similar to that in the

Answer choices

  1. Weak Conclusion Match18% picked this

    The residents of medium-sized towns are, on average, more highly educated than people who do not live in such towns. Therefore, Maureen, who was

    This would have worked had the conclusion said, "Therefore, Maureen, who is a resident of a medium-sized town is more highly educated than Monica, who is not a resident of a medium-sized town". Instead, the conclusion introduces some complications -- Maureen was born in a mid-size town, but who knows if she currently lives there. Monica is now a resident of a mid-size town, but only recently.

  2. Correct56% picked this

    At a certain college, either philosophy or engineering is the most demanding major. Therefore, either the introductory course in philosophy or the introductory course

    Why this is right

    This argument makes the same move from "if it's true of the Whole, then it's true of the Part". Either philosophy or engineering is the most demanding major (a whole). Thus, either Intro to Phil or Intro to English is the most demanding intro course (a part). This answer is hoping to strike people as unappealing since it introduces the structural mismatch of the either/or. But this answer is the only one that gives us a Whole to Part flaw. Would we have preferred a Whole to Part argument that didn't use an either/or? Yes that would be even better, but it's most important that we replicate the flaw.

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

  3. Part vs. Part21% picked this

    For many years its superior engineering has enabled the Lawson Automobile Company to make the best racing cars. Therefore, its passenger cars, which use

    This is making a Comparison flaw, assuming that "because trait X is true of Thing 1, trait X should also be true of similar Thing 2." We wanted a Whole to Part flaw, assuming that "because trait X is true of this Whole, trait X should also be true of a Part of this whole." Passenger cars are not a part of racing cars. They are both Parts of the Whole of Lawson Auto Company. This argument would have worked if it said, Lawson Automobile Company is very profitable. Therefore, its passenger car division must be very profitable.

  4. Part vs. Part2% picked this

    Domestic cats are closely related to tigers. Therefore, even though they are far smaller than tigers, their eating habits are almost the

    Domestic cats and tigers are both Parts of the Whole feline family. Since we're looking for an argument that goes from Whole to Part, we would need something like "Because trait X is true of felines, trait X is true of tigers."

  5. Trap3% picked this

    If a suit of questionable merit is brought in the first district rather than the second district, its chances of being immediately thrown out

    Better vs. Best (Wrong Flaw) Topic Trap This compares the first district to the second district, which is not the Whole vs. Part relationship we're looking for. This also contains the famous Topic Trap, which is when an answer choice on a Parallel or Analogy question tries to entice people by being about a similar topic (courts), rather than being logically similar the way the correct answer is supposed to be.

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