Logical ReasoningDifficulty: Medium

PT8 S4 Q13 Explanation

The dean of computing must

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

TopicsNecessary Assumption

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Stimulus

The dean of computing must be respected by the academic staff and be competent to oversee the use of computers on campus. The only deans whom academics respect are those who hold doctoral degrees, and only someone who really knows about computers can competently oversee the use of computers on campus. Furthermore, dean of computing must be a professor from this university’s computer science department.

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
13.

Which one of the following is an assumption on which the

Answer choices

  1. Too Strong: people (vs. deans)2% picked this

    Academics respect only people who hold

    The passage established that the only DEANS that academics respect are those who hold a doctoral degree but that doesn't mean the only PEOPLE they respect are those with doctorates.

  2. Too Strong: all7% picked this

    All of this university’s professors have obtained

    The argument has to assume that at least some professors in the computer science department have doctoral degrees, but not that all the professors at the university do.

  3. Too Strong: Every14% picked this

    At this university, every professor who holds a doctoral degree in computer science really

    The argument definitely has to assume that SOME professors who hold doctoral degrees, and who work in the computer science department, really know about computers. But she doesn't have to assume that they ALL know. She is claiming that the only eligible people for the dean of computing are in the CS department, not that everyone in the CS department is eligible to be dean of computing.

  4. Negation2% picked this

    All academics who hold doctoral degrees are respected by their

    We were told, "if a dean doesn't have a doctoral degree, then they won't be respected by academics." This is illegally negating that into "if a person does have a doctoral degree, then they will be respected by academics." This negation is a much stronger idea. The author was never saying that everyone with doctorates is respected, merely that having a doctorate is required to be respected. (i.e. "everyone without a doctorate isn't respected)

  5. Correct76% picked this

    Among this university’s staff members with doctoral degrees, only those in the computer science department

    Why this is right

    Since the author thinks that our search for the dean (which requires that one be a staff member, have a doctoral degree, and really know about computers) forces us to go to the Computer Science department. "it must be a professor from the CS department" implies that you could only find this magic combo there. If we negated this answer, it would be saying, "There are university staff members outside of the computer science department who have doctoral degrees and really know about computers", which would basically ruin the conclusion. The new dean doesn't HAVE to be from the CS department if there are people outside the CS department who meet the requirements.

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

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