Logical Reasoning · Inference

PrepTest 151 · Section 2 · Question 20

Phase 1 (your first ~400 questions): read the guidance, then answer. No clock.

Step 1 · Pre-Question Guidance · read this first

Question type

Inference

The one idea it tests

When one worker is better at a job because it spreads itself across fewer other jobs, the number of other jobs makes a difference.

The basic logic

Lunchbox Rule: only use what the passage packs. The stimulus explains a difference in how well two workers do a task by how widely each spreads its effort. So you may say that spreading wider matters. Do not stretch to 'always' or 'every' claims.

Tiny words that decide it

“because”
“whereas”
“more”

Playground logic

Priya shelves picture books better than Marcus (top bun) because Priya sticks to two aisles while Marcus roams everywhere (patty). The safe takeaway: how many other sections you cover affects how well you do this one.

Step 2 · The kid story

The Library Helpers

Ms. Rivera has two library helpers. Priya stays in two aisles, picture books and comics. Marcus zooms around the whole library, from atlases to cookbooks to mysteries. When it comes to putting picture books back in the right spot, Priya is way better. "Why?" asks Marcus, a little hurt. Ms. Rivera smiles. "Because you jump between so many sections. Priya sticks to just a few." Lulu writes on her clipboard. "So covering lots of other sections changes how well you shelve picture books." Marcus frowns. "Does that mean I'm bad at everything?" "Nope," says Priya, sipping her juice box. "Nobody said that. We only know about picture books."

Step 3 · Try the model question

Priya is much better than Marcus at reshelving picture books. This is because Priya works only in a couple of nearby aisles, while Marcus moves around the whole library and handles many kinds of books.

The facts above best back up which choice?

Step 4 · The courtroom tale

The Tale of Two Mechanics

A customer sues a garage over a slow brake repair. The garage owner explains on the stand. "Rita fixes brakes faster than Dom. Rita only works on brakes and tires. Dom works on everything: engines, radios, windows, you name it." The judge writes a note. Mr. Whitfield stands. "So Dom is worse at all of it?" "I never said that," the owner replies. "I said that juggling so many other jobs is why he is slower on brakes." The judge nods. "So the number of other jobs a mechanic handles affects brake work. That much I can accept. Anything beyond that, I cannot."

Step 5 · Work the real question

Open PrepTest 151, Section 2, Question 20 in your official copy from LSAC (for example in LawHub) and read it there.

Your answer

How to apply it

Spot the comparison and the reason the passage gives for it. Write the safest takeaway in your own words: the thing that differs between the two is what makes the difference. Run the Spoiler Test on each choice: does the passage already spoil it? Toss choices that say 'any' or 'always', that reverse a link, or that bring in new facts about where things are or how likely visits are.