Logical ReasoningDifficulty: Hard

PT16 S2 Q11 Explanation

If the needle on an industrial

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

TopicsMost Supported

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Stimulus

If the needle on an industrial sewing machine becomes badly worn, the article being sewn can be ruined. In traditional apparel factories, the people who operate the sewing machines monitor the needles and replace those that begin to wear out. Industrial sewing operations are becoming increasingly automated, however, and it would be is expected to become standard equipment in the automated apparel factories of the future.

What this question is testing

Most Supported

Anticipate

Why would a factory need a needle-monitoring device at all? If needles wore out at predictable rates — say, every 100 hours — you could just replace them on a schedule and skip monitoring entirely.

Evidence

The fact that monitoring (whether by people or by an acoustic device) is treated as necessary implies that needles wear unpredictably. You can't schedule replacements for something that wears at random rates.

Goal

Find the answer that captures this — needles wear out at unpredictable rates.

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 is most strongly supported by the

Answer choices

  1. Unsupported14% picked this

    In automated apparel factories, items will be ruined by faulty needles less frequently than happens

    The stimulus does not compare ruined-item rates between traditional and automated factories. The acoustic device might catch worn needles as well as, better than, or worse than human monitors — we are not told. This goes beyond what the stimulus supports.

  2. Too Strong4% picked this

    In the automated apparel factories of the future, each employee will perform only one

    The stimulus says it would be inefficient to hire someone just for needle monitoring. That does not imply that every employee will be limited to a single task. Employees might perform many tasks; the inefficiency is in dedicating a whole position to one narrow task. This overgeneralizes.

  3. Too Strong10% picked this

    Traditional apparel factories do not use any

    The stimulus says industrial sewing is becoming "increasingly automated," which leaves room for traditional factories to use some automated equipment. The stimulus does not say traditional factories use no automation at all — only that they monitor needles via workers.

  4. Correct58% picked this

    The needles of industrial sewing machines wear out at

    Why this is right

    This follows naturally from the stimulus. The whole reason monitoring is needed — by humans in traditional factories, by an acoustic device in automated ones — is to catch needles when they begin to wear. If needles wore out at predictable rates, factories could simply replace them on a schedule and skip monitoring altogether. The fact that monitoring is treated as necessary supports the inference that needles wear at unpredictable rates.

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

  5. Unsupported14% picked this

    As sewing machine needles become worn, the noise they make becomes

    The stimulus says the device is "acoustic," but it does not say worn needles get audibly louder. The device might detect subtle changes in pitch, frequency, or sound signature — not loudness. Inferring increasing loudness specifically goes beyond what "acoustic detection" tells us.

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