An editor is compiling

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

TopicsMust be True

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

Free to start

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

An editor is compiling a textbook containing essays by several different authors. The book will contain essays by Lind, Knight, or Jones, but it will not contain essays by all three. If the textbook contains will also contain an essay by Jones.

What this question is testing

Must be True

Your task

Break the argument into its conclusion and evidence, then do exactly what the question stem asks with that structure.

Common trap

Answers that sound relevant to the topic but don't connect to the argument's actual reasoning.

Winning move

Predict what a right answer must do, then test each choice against the conclusion-evidence 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

19.

If the statements above are true, which one of the following must

Answer choices

Correct83% picked this
If the textbook contains an essay by Lind, then it will not contain an
Why this is right
This follows from the 1st K → J and 2nd statements K + J → ~L ⏤⏤⏤⏤⏤⏤⏤ ∴ L → ~K
Skill tested: Must be True · how this choice captures the argument's function is the move to repeat next time.
83%
Too Strong3% picked this
The textbook will contain an essay by only one of Lind,
The textbook could contain entries by both Knight and Jones
3%
Too Strong2% picked this
The textbook will not contain an essay
The textbook could contain entries by both Knight and Jones
2%
Unsupported Relationship9% picked this
If the textbook contains an essay by Lind, then it will also contain an
The textbook could contain an essay by only Lind.
9%
Too Strong4% picked this
The textbook will contain an essay
The textbook could contain essays by both Knight and Jones, but not Lind.
4%

Continue the review in LSAT Lab

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

Save and practice this skill

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