Logical Reasoning · Strengthen

PrepTest 150 · Section 2 · Question 7

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

Step 1 · Pre-Question Guidance · read this first

Question type

Strengthen (Justify a Prediction)

The one idea it tests

If a good thing is limited only by one obstacle, evidence that the obstacle is about to disappear supports the prediction that the good thing will spread.

The basic logic

Find what limits the benefit today (where it works) and the prediction (it will work almost everywhere soon). The best support removes the limit itself. Answers about other benefits or about everyone getting better do not help this specific prediction.

Tiny words that decide it

“currently”
“however”
“near future”
“most areas”

Playground logic

Owen's sail-kites fly only on the windy hilltop today, but fans say kids will fly them in most backyards soon. The patty says the limit is strong wind; the top bun says that limit will stop mattering. A new kite that lifts in light breezes would knock out the limit and prop up the top bun.

Step 2 · The kid story

Owen's Sail-Kites

Owen sells sail-kites at recess. They are the best kites ever, better than store kites, but there is a catch: they only fly where the wind is strong, which right now means the top of Pinecone Hill. Everywhere else, they flop. Still, the Sail-Kite Fan Club insists that soon kids will fly them in most backyards in town. Marcus scoffed. "How? Backyards have puny wind." Priya sipped her juice box. "What would make the fans right?" Lulu thought hard. "Something that fixes the wind problem. Like a new sail that catches tiny breezes." Owen grinned and pulled out a sketch. "Funny you should say that. My uncle is testing one this month." The fan club cheered.

Step 3 · Try the model question

Sail-kites outperform store kites, but right now they only fly in the few places with strong wind, such as the hilltop. Still, fans claim that soon sail-kites will fly well in most backyards in town.

Which fact, if it holds, gives the most support to the fans' claim?

Step 4 · The courtroom tale

The Mountain Spring Water

A water company lawyer faced the judge. "Your Honor, our spring water is cheaper than bottled water, but today only towns at the foot of the mountain can get it. We predict that soon most towns in the county will have it at the same low price." The judge frowned. "Why should I believe that?" Mr. Whitfield, for the company, unrolled a blueprint. "Because a new pipeline is being finished that carries the water far beyond the mountain at very low cost." The judge nodded. "Now that is evidence. You fixed the reason it was limited."

Step 5 · Work the real question

Open PrepTest 150, Section 2, Question 7 in your official copy from LSAC (for example in LawHub) and read it there.

Your answer

How to apply it

Pin down three pieces: the advantage, the reason it is limited to certain places today, and the prediction that it will spread. Then ask which choice removes that limiting reason. Skip choices that list other benefits, that compare general output, or that help all competitors equally, since those do not explain the spread. The winner attacks the limit directly and makes the prediction realistic.