Logical ReasoningDifficulty: Easy

PT106 S2 Q5 Explanation

A newly developed light bulb is

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

TopicsStrengthen

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Stimulus

A newly developed light bulb is much more cost-effective than conventional light bulbs: it costs only about 3 times what a conventional light bulb costs but it lasts up to 10 times as long as a conventional light bulb. Despite the manufacturer’s intense efforts to publicize the that these new bulbs will prove to sell very poorly.

What this question is testing

Strengthen

Your task

Find the choice that makes the argument's conclusion more likely to be true.

Common trap

Answers that are consistent with the argument but add no real support, or that strengthen a claim the argument doesn't make.

Winning move

Locate the gap between evidence and conclusion, then pick the choice that closes it.

Reading along? Open the full official question in LawHub — we show a fragment here and keep the reasoning in our own words.

The question
5.

Each of the following, if true, provides support for the analyst’s

Answer choices

  1. Strengthens2% picked this

    The light generated by the new bulb is in the yellow range of the spectrum, a type of artificial

    The new bulbs won't sell well because ... people don't like the unappealing yellow tint of light the bulbs give off

  2. Strengthens5% picked this

    Most people who purchase light bulbs prefer to buy inexpensive light bulbs rather than more durable

    The new bulbs won't sell well because ... people just want to buy the cheapest bulb, regardless of shorter life span

  3. Strengthens2% picked this

    A manufacturer of one brand of conventional light bulb has advertised claims that the new light bulb uses more electricity

    The new bulbs won't sell well because ... there's a lying advertisement out there making people think that new bulbs use more electricity

  4. Correct84% picked this

    The new bulb is to be marketed in several different quantities, ranging from packages containing one bulb to

    Why this is right

    This actually sounds like a good thing -- you can choose to buy them as singles or multi-packs.

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

  5. Strengthens8% picked this

    A competing manufacturer is about to introduce a light bulb that lasts 10 times as long as a conventional bulb but costs

    The new bulbs won't sell well because ... there's another bulb coming out that will kick this one's butt (costs way less and lasts 10 times as long)

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