Logical ReasoningDifficulty: Medium

PT134 S3 Q23 Explanation

Most auto mechanics

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

TopicsParallel Flaw

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Stimulus

Most auto mechanics have extensive experience. Furthermore, most mechanics with extensive experience understand electronic circuits. Thus, understand electronic circuits.

What this question is testing

Parallel Flaw

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.

The pattern of flawed reasoning in which one of the following arguments is most similar to that in

Answer choices

  1. No Most Claims7% picked this

    During times of the year when automobile traffic increases, gas prices also increase. Increases in gas prices lead to increases in consumer complaints. Thus,

    The fact that none of these claims are based on "most" means that we won't be replicating the structure or flaw of the original.

  2. Weak Premise / Conclusion Match5% picked this

    The most common species of birds in this region are migratory. Moreover, most migratory birds have left this region by the end of November.

    The conclusion says "few do", which means "most don't", so we can potentially still use this one. The biggest problem is that the first sentence is not "Most X's are A", it's "the most common type of A is X." That doesn't work. The most common type of religious affiliation is Islam, but that doesn't mean that "most people are Muslims". A matching argument might have said, "Most canaries are migratory. Most birds that migrate have left by end of November. Thus, most canaries have left by end of November."

  3. Only One Premise1% picked this

    It is not surprising that most speeding tickets in this region are issued to drivers of sports cars. After all, most drivers who are

    There's only one premise here, so it won't be able to match the structure or flaw of the original.

  4. Weak Premise / Conclusion Match9% picked this

    Most nature photographers find portrait photography boring. Moreover, most portrait photographers especially enjoy photographing dignitaries. Thus, most nature photographers

    The two "most" premises are supposed to sort of chain together: Most subtype X's are A. Most X's that are A are B. These two "most" premises are about different groups altogether. Most nature photographers are A. Most X's are A Most portrait photographers are B. Most Y's are B The second premise should have sounded like, "Most nature photographers who find portrait photography boring enjoy photographing dignitaries" and then it would have concluded, "Thus, most nature photographers enjoy photographing dignitaries".

  5. Correct77% picked this

    Most snow-removal companies run lawn-care services during the summer. Also, most companies that run lawn-care services during the summer hire additional workers in the

    Why this is right

    This takes "most" of a "most". Most snow-removal Most subtype X's are A. companies run lawn care during the summer Most companies that Most X's are B. run care during summer hire additional people in summer Thus, most snow Most subtype X's removal companies are B. hire additional people in summer

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

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