Logical ReasoningDifficulty: Hard

PT127 S1 Q22 Explanation

Only a minority of those

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

TopicsParallel Flaw

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Stimulus

Only a minority of those who engage in political action do so out of a sense of social justice. Therefore, some people who have a sense engage in political action.

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
22.

Which one of the following uses flawed reasoning most similar to that used in

Answer choices

  1. Correct70% picked this

    Most scholars are not motivated by a desire to win prestigious academic prizes. Thus, some of those who want to win prestigious

    Why this is right

    We can match this up, but we do need to demonstrate an understanding of how to re-write negative statements in their positive form. Any time we see any of these three negatives on the left we're supposed to be re-writing them as the positive form on the right No A's are B = All A's are not B Few A's are B = Most A's are not B Not all A's are B = Some A's are not B CONC: Some A's are not B some [prize-wanters] are not [scholars] EVID: Only a minority of B's are A (i.e. most B's are not A) most [scholars] are not [prize-wanters] Just as the original argument was flawed because it's conclusion talks about people who don't engage in political action, but it's evidence only talks about people who do engage in political action, this argument is flawed because it's conclusion talks about not scholars but it's evidence only talks about scholars.

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

  2. Bad Premise / Conclusion Match2% picked this

    Only foolish politicians disregard the wishes of most voters. Thus, most voters deserve to be

    Neither one of these ingredients matches structurally. In the original argument, the premise was a Few / Most type claim. Here it's a conditional. In the original, the conclusion was a Some claim. Here it's a Most claim. Each of those mismatches is enough to get rid of this. The premise tries to fool people into thinking there's a match by using the word only, but it's being used completely differently from how the premise uses it. "only a minority of A's are B" = most A's are not B "only A's do B" = if you're B, then you're A

  3. Bad Premise / Conclusion Match4% picked this

    Some corporations only feign a concern for the environment when they advertise a product as environmentally friendly. Thus, no corporation has a

    Neither one of these ingredients matches structurally. In the original argument, the premise was a Few / Most type claim. Here it's a Some statement. In the original, the conclusion was a Some claim. Here it's a No / All claim. Each of those mismatches is enough to get rid of this.

  4. Bad Premise / Conclusion Match12% picked this

    Some parents show no interest in the curricula used in the schools that their children attend. Thus, some of the decisions regarding school curricula

    In the original argument, the premise was a Few / Most type claim. Here it's a Some claim. That's good enough reason to bail. In addition, the Conclusion isn't recycling the ideas from the Premise, as the original conclusion did (it just moved around the concepts of engage in political action and sense of social justice). Instead, it's introducing brand new concepts, like "decisions about curricula" and "without regard for wishes".

  5. Bad Conclusion Match11% picked this

    Only a small percentage of the profits that companies make are directly attributable to good management decisions. Thus, even companies that are managed

    In the original argument, the conclusion was a Some claim. Here it's a Few / Most type claim, because "usually" means Most. If our conclusion were "some companies that are managed badly will turn a profit", then we would want the premise to say "only a minority of companies that are unprofitable are managed badly".

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