Logical ReasoningDifficulty: Hard

PT135 S1 Q15 Explanation

Researcher: Every year approximately

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

TopicsFlaw

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Full official LSAT questions are available through LawHub. This page provides LSAT Lab's explanation, strategy, and review tools without republishing the full official question.

Stimulus

Researcher: Every year approximately the same number of people die of iatrogenic "disease"—that is, as a direct result of medical treatments or hospitalization—as die of all other causes combined. Therefore, if medicine could find ways of of deaths per year would decrease by half.

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
15.

The reasoning in the researcher's argument is flawed because the argument fails

Answer choices

  1. Out of Scope8% picked this

    prevention of non-iatrogenic disease will have an effect on the occurrence

    Prevention of non-iatrogenic disease is not being considered. This argument is about the number of lives that would be saved by preventing iatrogenic disease.

  2. Out of Scope1% picked this

    some medical treatments can be replaced by less invasive or

    Whether it is actually possible to prevent some iatrogenic deaths is irrelevant since the researcher’s conclusion is qualified by the condition that all iatrogenic disease were prevented.

  3. Correct67% picked this

    people who do not die of one cause may soon die

    Why this is right

    This points out a reason why the number of deaths per year might decrease by less than half.

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

  4. Out of Scope7% picked this

    there is no one way to prevent all cases of death

    Whether it is actually possible to prevent 100 percent of iatrogenic deaths is irrelevant since the researcher’s conclusion is qualified by the condition that all iatrogenic disease were prevented.

  5. Reversal16% picked this

    whenever a noniatrogenic disease occurs, there is a risk of

    This reverses a point that would undermine the researcher’s argument. If iatrogenic disease carried the risk of non-iatrogenic disease, the conclusion would be less likely to follow from the evidence.

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