Logical ReasoningDifficulty: Medium

PT139 S4 Q8 Explanation

To qualify as a medical specialist

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

TopicsNecessary Assumption

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Stimulus

To qualify as a medical specialist, one must usually graduate from a university, then complete approximately four years of medical school, followed by a residency of two to six years in one's specialty. Finally, a physician who desires to become a recognized specialist must complete an evaluation program directed by a medical medical specialist is competent to practice in his or her specialty.

What this question is testing

Necessary Assumption

Your task

Find the assumption the argument requires in order for its conclusion to hold.

Common trap

Answers that would help the argument but aren't strictly required (sufficient, not necessary).

Winning move

Negate each choice — the right one breaks the argument when negated.

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

The question
8.

Which one of the following is an assumption on which the

Answer choices

  1. Out of Scope: highly motivated1% picked this

    People who are not highly motivated will not complete the demanding course of study and examination required to become qualified

    We can stop reading this six words in. The argument never discussed anyone's motivation, let alone a specific subcategory, highly motivated. The conclusion is about whether or not someone is competent to practice. Being competent doesn't require being highly motivated.

  2. Out of Scope: most talented1% picked this

    Only the most talented people will successfully complete the rigorous course of study necessary for qualification as

    We can stop reading this five words in. The argument never discussed anyone's talent level, let alone an extreme subset, the most talented people. The conclusion is about whether or not someone is competent. Being competent doesn't require being the most talented.

  3. Correct72% picked this

    No one incompetent to practice a particular specialty completes the evaluation program

    Why this is right

    When Necessary Assumption questions have conditional logic in them, we usually want to diagram them (often we'll need to contrapose them) and see if they match a reasoning move the author made. This one requires a negative to positive translation: No A's are B = All A's are ~B (A ? ~B) Incompetent to ? Doesn't complete practice specialty eval program For correct answers, we usually have to contrapose it, because they hide its appeal by presenting it in contrapositive form. Does complete Competent to eval program ? practice specialty Did our author make that reasoning move? Yes! That's how she goes from the 2nd to the 3rd sentence. When we combine this answer with the 2nd sentence, we build the logic path the Conclusion is claiming exists. Evidence + Assumption Qualified completed competent as recog -----> eval prog -----> to practice med spec for specialty specialty

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

  4. Too Strong: sufficient14% picked this

    Usually, six to ten years of medical training beyond a university degree is sufficient to render someone competent to practice in

    The author doesn't need to think that the first sentence (6-10 years is coming from 4 yrs of med school + 2-6 years of residency) is enough to already qualify as competent. She declares that a recognized specialist will always be competent, but she hasn't commented at all on what percentage of regular medical specialists can be counted on to be confident.

  5. Too Strong: necessary12% picked this

    Usually, six to ten years of medical training beyond a university degree is necessary to render someone competent to practice in

    Although this appeals to common sense -- it felt like the educational trajectory described in the first sentence was like some chain of requirements -- nothing in the argument said anything in the first sentence was necessary. The conclusion is about recognized specialists, and the only thing we are told is required of recognized specialists is that they complete an evaluation program in their specialty. Another way to detect that this answer is wrong is that by negating it, we'd be saying that "usually people don't need 6-10 years to be competent. People who have studied less than that are usually competent." That wouldn't hurt the author's conclusion at all. The more competent people there are, the more likely the author's conclusion is true. We could only hurt this argument by pointing to the existence of incompetent recognized specialists.

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