Logical ReasoningDifficulty: Easy

PT134 S1 Q21 Explanation

Game show winners choosing

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

TopicsParallel

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Stimulus

Game show winners choosing between two equally desirable prizes will choose either the one that is more expensive or the one with which they are more familiar. Today's winner, Ed, is choosing between two equally desirable and equally thus choose A, which is more expensive.

What this question is testing

Parallel

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 reasoning in which one of the following is most similar to

Answer choices

  1. Bad Conclusion Match / Flawed Logic4% picked this

    With a book contract, an academic writer receives either an advance or a guarantee of royalties. Professor al-Sofi received an advance for a book

    This concludes that something one of the "or" options did not happen, whereas the original argument concluded that one of the "or" options did happen. This argument is actually flawed logic because "either X or Y" means "at least one of them", not "exactly one of them". If we're ever expected to think exactly one of them, it will say "but not both". So it's possible that someone gets both an advance and a guarantee.

  2. Bad Conclusion Match / Flawed Logic3% picked this

    When entering this amusement park, children always choose to take their first ride on either the Rocket or the Mouse. Janine insisted on the

    Similar to (A), this conclusion is ruling out the other option, although it's not even a match for the other option, it's a weirdly specific new idea about where she would have been standing. In the original argument, a premise ruled out one of the two options, and the conclusion affirmed the remaining option. In (A) and (B), we've seen the premise affirming one of the two options, and then trying to conclude that the other one (or something related to the other one) is ruled out.

  3. Bad Premise Match10% picked this

    The elliptical orbit of an asteroid is only slightly eccentric unless it is affected by the gravitational pull of a planet. Asteroid Y is

    Bad Premise Match: No "or" in the Outcome To mimic the flow of the original argument, we need an either/or so that can we can rule out one option and conclude the other. This conditional doesn't give us an either/or outcome.

  4. Bad Conclusion Match2% picked this

    New students in this program must choose either a physics class or an art class. Miyoko has no desire to take a class in

    We do get an either/or, physics or art. But rather than ruling one out and concluding the other, the author rules them both out and concludes that the trigger will probably not happen.

  5. Correct80% picked this

    To avoid predators, rabbits will either double back on their pursuers or flee for nearby cover. The rabbit being pursued by a fox in

    Why this is right

    We get a conditional either/or, double back or flee for cover. Then the facts establish that the trigger has been met (we have a rabbit that is trying to avoid predators), rules out one option (not gonna flee) and concludes the other option. Rabbit Double back + ? or Avoiding Predators Flee for cover This pursued rabbit is avoiding predators. It can't flee. ?????????????????????????????????????????? Thus, it will double back.

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

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