Logical ReasoningDifficulty: Hard

PT5 S1 Q11 Explanation

No one who lacks knowledge

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

TopicsFlaw

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Stimulus

No one who lacks knowledge of a subject is competent to pass judgment on that subject. Since political know-how is a matter, not of adhering to technical rules, but of insight and style learned through apprenticeship and experience, only a particular political policy is fair to all.

What this question is testing

Flaw

Conclusion

The author concludes only seasoned politicians can judge whether a policy is fair to everyone.

Evidence

The setup: you can't judge what you don't know. And political know-how is the kind of skill you only get through apprenticeship and experience — insight, style, the practical art of doing politics.

Evaluate

Watch the conclusion's wording carefully. The conclusion is about judging whether a policy is "fair to all" — i.e., its social impact, who benefits, who is harmed.

That's a different kind of question from "how do you do politics well." Doing politics well requires the practical know-how the argument describes — apprenticeship, insight, style. But judging whether a policy is fair to everyone requires understanding its social and ethical implications. A philosopher, an economist, or an affected citizen might have deep insight on social fairness without ever working as a politician.

The argument quietly treats these two kinds of expertise as if they were the same. That's the flaw.

Goal

Pick the answer that names the equation: political know-how is being treated as identical to understanding the social implications of policies.

Reading along? Open the full official question in LawHub — we show a fragment here and keep the reasoning in our own words.

The question
11.

A major weakness of the argument is

Answer choices

  1. Bad Description27% picked this

    Relies on a generalization about the characteristic that makes someone competent

    The argument's opening claim ("no one lacking knowledge of a subject is competent to pass judgment") is a generalization, but it's not the flaw. The argument's problem isn't that it generalizes about competency-and-knowledge; it's that it conflates two different kinds of knowledge once it gets to the conclusion. Calling the generalization itself the flaw misses the actual move.

  2. Bad Description2% picked this

    Fails to give specific examples to illustrate how political know-how can

    Whether the argument provides specific examples isn't a logical flaw — it's just a stylistic choice. Lots of valid arguments lack examples, and lots of fallacious ones have plenty. The actual flaw is in the equivocation between political know-how and the understanding required to judge social impact, not in the absence of examples.

  3. Bad Description0% picked this

    Uses the term “apprenticeship” to describe what is seldom a

    The argument uses "apprenticeship" as part of its description of how political know-how is acquired. Whether that's a strict or loose use of the word is a definitional quibble, not the argument's logical flaw. The actual flaw is that the conclusion is about a different kind of expertise (judging fairness) than the premises establish (political practice).

  4. Correct70% picked this

    Equates political know-how with understanding the social implications of

    Why this is right

    This nails the move. The premises establish that political know-how — the practical skill of doing politics — comes from apprenticeship and experience. But the conclusion is about who can judge whether a policy is fair to all, which is a question about the policy's social implications. The argument silently treats "having political know-how" as if it amounted to "understanding the social implications of policies." But these are different kinds of expertise: one is about how to do politics, the other is about what policies do to society. By equating them, the argument illegitimately concludes that only seasoned politicians can judge fairness.

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

  5. Bad Assumption2% picked this

    Assumes that when inexperienced politicians set policy they are guided by the advice of

    The argument doesn't need to claim inexperienced politicians are guided by experienced ones. The argument is about who is competent to judge a policy's fairness, not about how inexperienced politicians actually behave when setting policy. This describes an assumption the argument doesn't make.

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