Logical ReasoningDifficulty: Easy

PT110 S2 Q21 Explanation

Professor Chan: The literature department’s

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

TopicsNecessary Assumption

Keep going in LSAT Lab

  • Save & drill this skill build targeted practice sets from questions like this one

  • Video walkthroughs watch every question solved step by step

  • 81 official LSATs as questions, timed sections & full-length tests

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

Professor Chan: The literature department's undergraduate courses should cover only true literary works, and not as advertisements.

Professor Wigmore: Advertisements might or might not be true literary works but they do have a powerfully detrimental effect on society-largely because people cannot discern their real messages. The literature department's courses give students the critical skills to analyze and understand texts. Therefore, the study of advertisements in its undergraduate courses.

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
21.

Which one of the following is an assumption on which Professor Wigmore’s

Answer choices

  1. Too Strong: never3% picked this

    Texts that are true literary works never have a detrimental effect

    Wigmore's argument has nothing to do with "true literary works", so we can really stop reading there. But this is also an absurdly extreme claim that Wigmore did not commit herself to. If we negate this and say, "There is at least one text that was a true literary work that had some detrimental effect on society", it would have no effect on the argument.

  2. Too Strong: cannot3% picked this

    Courses offered by the literature department cannot include both true literary works and material

    Wigmore's argument has nothing to do with "true literary works", so we can really stop reading there. This is another very extreme claim that Wigmore did not commit herself to. If we negate this and say, "Courses offered by the LIt Department can include both ads and true literary works", that would have no effect on the argument.

  3. Too Strong11% picked this

    Students who take courses in the literature department do not get from those courses other skills besides those needed

    Too Strong: no other skills Only Mentioned ? Only This is saying that the only skills students get from Literature Department courses is the skill of analyzing and understanding texts. Necessary Assumption loves to give this type of trap answer. The only skills mentioned in the paragraph are "analyze and understand texts", but that doesn't imply that those are therefore the only skills. When I say, "Irish people love Christmas", I am not implying that "Irish people are the only people who love Christmas".

  4. Out of Scope: entirely through visual3% picked this

    Forms of advertising that convey their message entirely through visual images do not have a

    Wigmore's argument is about all advertisements. This answer is about a specific subset: those ads that convey messages entirely through visual images. Since Wigmore never discussed this specific subset, we can't accuse her of assuming any specific beliefs about this subcategory of ads.

  5. Correct81% picked this

    The literature department’s responsibility is not limited to teaching students how to analyze

    Why this is right

    This is a surprising correct answer. It's worth considering because it's using ruling-out language (not), which is the hallmark of so many correct Necessary Assumption answers. If we negate this and say, "The literature department's responsibility is limited to teaching students how to analyze true literary works", does that hurt the argument? Yes. Wigmore is acknowledging in her first sentence that ads might not be true literary works. If they aren't true literary works, then according to this negation the literature department has no responsibility to teach them. The possibility that ads belong to a category of things that this department has "no responsibility to teach" badly weakens the argument. So this works as a correct answer.

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

Continue the review in LSAT Lab

Save this question, watch the video walkthrough, and drill similar questions in your LSAT Lab account.

LSAT Lab

Turn this review into a targeted study plan.

Save this question, drill more like it, watch the video walkthrough, and track your progress in your LSAT Lab account.

Start practicing free