Logical ReasoningDifficulty: Medium

PT154 S4 Q11 Explanation

Gyms and fitness centers are

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

TopicsPrinciple-Strengthen

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

Gyms and fitness centers are sometimes good places to buy used exercise machines. When gyms and fitness centers upgrade machines, they often sell the old machines at reasonable prices. Although these exercise machines have generally seen considerable use, they are also built and are likely to have been well maintained.

What this question is testing

Principle-Strengthen

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
11.

Which one of the following principles, if valid, most helps to justify the reasoning in

Answer choices

  1. Backwards Logic14% picked this

    Any good source of used exercise machines will offer at least some well-maintained machines

    This rule says: good source of used offers well-maintained exercise machines ? at reasonable prices That is showing us Conclusion ? Premise We are always looking for Premise ? Conclusion

  2. Bad Premise Match2% picked this

    The best kind of used exercise machine to buy is a well-maintained machine designed for home use and

    This principle could potentially strengthen a conclusion about where to buy exercise machines, if the description it offered of the "best kind" matched what sort of inventory gyms and fitness centers are selling. However, the description didn't match. The machines at G's and FC's are not designed for home use. They were built better because they were intended (and used) for lots of use at a gym.

  3. Correct79% picked this

    Any place where one can buy well-maintained, used exercise machines at reasonable prices is a good place to

    Why this is right

    This answer correctly puts the premise language on the left and the conclusion language on the right. place where on can buy well maintained used ? good place to buy exercise machines at reasonable price I'm surprised LSAC was generous enough with this correct answer to still use the verbatim language of the conclusion. With a fuzzy claim like "sometimes a good place", this seemed like a ripe contender for the sort of correct answer that offers a strengthener, but not a conditional guarantee of the conclusion's wording. But happy surprise! In case we were bothered by the fact that this answer leaves out "better-built than home machines", remember that a correct answer is under no burden to use all the Premise facts we heard about. If we're trying to prove that Bob is a dork, and we learn facts X, Y, and Z about Bob, then any rule that gets us from X, Y, or Z (or any combination) to "is a dork" satisfies our purpose.

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

  4. Bad Conclusion Match2% picked this

    No place that sells only exercise machines designed for home use is a good place to

    This rule allows you to prove that a place is not a good place to buy used exercise machines. We're only interested in a rule that would allow us to prove / strengthen that a place is a good place. Rules can only prove what's on the right side of the arrow. This one says: Place sells only exercise not a good machines designed for ? place to buy home use used machines

  5. Backwards Logic3% picked this

    No good source of used exercise machines sells any poorly maintained exercise machines

    Just like (A), this rule goes from Conclusion language to Premise language, which is never what we want. Good source of used does not sell exercise machines ? poorly maintained equip at high price If we contraposed this, it would only allow us to prove that a place was not a good source of used exercise machines. You can only prove the ideas on the right side of the arrow.

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