Logical ReasoningDifficulty: Medium

PT12 S1 Q17 Explanation

On average, city bus drivers

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

TopicsParallel Flaw

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Stimulus

On average, city bus drivers who are using the new computerized fare-collection system have a much better on-time record than do drivers using the old fare-collection system. Millicent Smith has the best on-time record of any she must be using the computerized fare-collection system.

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
17.

Which one of the following contains flawed reasoning most similar to that contained in

Answer choices

  1. Trap13% picked this

    All the city’s solid-waste collection vehicles acquired after 1988 have a larger capacity than any of those acquired before 1988. This vehicle has the

  2. Trap8% picked this

    The soccer players on the blue team are generally taller than the players on the gold team. Since Henri is a member of the

  3. Correct74% picked this

    This tomato is the largest of this year’s crop. Since the tomatoes in the experimental plot are on average larger than those grown in

    Why this is right

    Answer C is correct.

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

  4. Trap1% picked this

    Last week’s snowstorm in Toronto was probably an average storm for the area. It was certainly heavier than any snowstorm known to have occurred

  5. Trap3% picked this

    Lawn mowers powered by electricity generally require less maintenance than do lawn mowers powered by gasoline. This lawn mower is powered by gasoline, so

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