Logical ReasoningDifficulty: Hard

PT138 S3 Q21 Explanation

Professor Riley characterized

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

TopicsFlaw

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 Riley characterized the university president's speech as inflammatory and argued that it was therefore inappropriate. However, Riley has had a long-standing feud with the president, and so we should not conclude that her speech was inflammatory solely on the basis of Riley's testimony. Therefore, unless there inflammatory, it is not true that her speech was inappropriate.

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
21.

The argument is flawed in that

Answer choices

  1. Correct53% picked this

    takes for granted that the speech could not be inappropriate if it

    Why this is right

    This is accusing the author of making a conditional assumption. Let's look at the conditional and ask ourselves whether the author did in fact make that move: if the speech wasn't inflammatory, it wasn't inappropriate Yes, that seems to match. The author is saying, "Riley's claim that it was inflammatory can't be trusted on its own, so if we don't have any other evidence it was inflammatory, then we can't conclude inflammatory, and therefore we CAN conclude appropriate." Our author is failing to consider that even if the speech weren't inflammatory, it could still be inappropriate for some other reason (maybe it contained a lot of lies or mistruths). This answer is a veiled nod to the Unproven vs. Proven False flaw: the author is acting like "as long as I reject YOUR argument for why the speech was inappropriate, then I've proven it was appropriate", and LSAT is saying "hey, buddy, the speech could still be inappropriate. It's too soon to conclude that."

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

  2. Wrong Argument3% picked this

    fails to adequately address the possibility that inflammatory speeches may be appropriate

    This would be a Flaw with Riley's argument core. He said "speech was inflammatory and therefore inappropriate", so this answer would call out his questionable assumption that "inflammatory ? inappropriate".

  3. Out of Scope: favors president's side2% picked this

    favors the university president's side in a dispute simply because of the

    The author never takes the president's side. She simply points out that since Riley and the president have a long-standing feud, their statements about each other may be unduly tainted by that feud. If the president had said something about Riley, this author would have presumably rejected the president's remarks for the same reason.

  4. Too Strong27% picked this

    concludes that Riley's claim is false merely on the grounds that Riley has something to gain if the

    Too Strong: false Out of Scope: something to gain This answer is very tempting, because the Ad Hominem feel of "Since they have a feud, we can't trust Riley's claim" feels a lot like this answer. But the author doesn't full-on conclude Riley's accusation (that the speech was inflammatory) was false. In fact, she's leaving open the possibility that it's true by saying, "unless we find independent reasons for thinking the speech was inflammatory ...". She is still open to the possibility that the claim is true, so she hasn't yet concluded that it's false. Also, it's a little murky whether Riley "has something to gain" if people accept it as true that the president's speech was inflammatory. We might think, "well since they're in a feud, Riley has cheap, sadistic pleasure to gain in getting people to accept a negative truth about the president's speech." That's a more petty sense of "something to gain" than I think LSAT would use.

  5. Out of Scope: well founded animosity15% picked this

    fails to adequately address the possibility that Riley's animosity toward the university president

    No part of the argument is concerned with whether Riley or the president is right/wrong in their feud. It's only brought up as a way to say that Riley's testimony isn't the strongest leg to stand on.

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