Logical ReasoningDifficulty: Hard

PT154 S1 Q23 ExplanationInventor: All highly successful

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

TopicsMust be True

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Stimulus

Inventor: All highly successful entrepreneurs have as their main desire the wish to leave a mark on the world. Highly successful entrepreneurs are unique in that whenever they see a solution to a problem, they implement that idea. All other people see solutions to problems but are to always have the motivation to implement their ideas.

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
23.

If the inventor’s statements are true, which one of the following must

Answer choices, explained

  1. Too Specific: most people10% picked this

    Most people do not want to leave a mark on the world because trying to do so would reduce their

    We don't have any information in the passage about what's true of 51% or more of people, so I would stop reading this after the first two words. There's no way to relate "most people" to whether or not they're a highly successful entrepreneur, because we aren't told what proportion of the population is or isn't a highly successful entrepreneur.

  2. Unsupported Relationship5% picked this

    All people who invariably implement their solutions to problems have at least some interest in leisure

    Do we know anything about all people who invariably implement their solutions? Yes, those people are highly successful entrepreneurs (this might feel like it's reading backwards, but since we were told that highly successful entrepreneur's are unique in this capacity, we know that everyone else doesn't do it)

  3. Correct58% picked this

    The main desire of all people who implement solutions whenever they detect them is to leave a

    Why this is right

    Do we know anything about all people who implement solutions whenever they detect them? Yes, those people are highly successful entrepreneurs (this might feel like it's reading backwards, but since we were told that highly successful entrepreneur's are unique in this capacity, we know that everyone else doesn't do it) Do we know whether the main desire of all highly successful entrepreneurs is to leave a mark on the world? Yes! The first sentence told us that. If you're determined to diagram your way to the answer, then the important part of the stimulus would have been the unique, which made a bi-conditional of the second rule. highly successful entrepreneur ? always implement solution as well as always implement solution ? highly successful entrepreneur. Since we also knew that highly successful entrepreneur ? main desire is leave mark We could chain those together and get: always highly main desire implement ? successful ? leave mark solution entrepreneur on world

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

  4. Out of Scope: negative impact21% picked this

    Generally, highly successful entrepreneurs’ interests in leisure time or job security are not strong enough to have a negative impact on their

    This might seem like a reasonable speculation, but all we know about highly successful entrepreneurs is that WHEN / IF they see a solution, they always implement it. This answer is talking about whether their ability to see a solution is sometimes impaired. It might be. That's perfectly compatible with the passage. When Elon Musk goes to his private island for a Ski-ball tournament with Bill Gates and Mark Zuckerberg, this leisure time might compromise their ability to see solutions to problems. However, IF they eventually see a solution, they will all be sure to implement it.

  5. Out of Scope6% picked this

    All people whose main desire is to implement their solutions to problems leave a mark

    Out of Scope: actually leaving a mark We only talked about a desire to leave a mark on the world. We have no information about people actually leaving a mark on the world.

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