Logical ReasoningDifficulty: Medium

PT118 S3 Q5 Explanation

Cigarette companies claim that manufacturing

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

TopicsParadox

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Stimulus

Cigarette companies claim that manufacturing both low-and high-nicotine cigarettes allows smokers to choose how much nicotine they want. However, a recent study has shown that the levels of nicotine found in the blood of smokers who smoke one pack of cigarettes per day are identical at the the level of nicotine in the cigarettes they smoke.

What this question is testing

Paradox

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
5.

Which one of the following, if true, most helps to explain the finding of

Answer choices

  1. Correct71% picked this

    Blood cannot absorb more nicotine per day than that found in the smoke from a package of

    Why this is right

    If blood can only absorb, say, 10mg of nicotine, and a pack of low-nicotine cigarettes provides at least that much, then it doesn't matter whether a pack of high-nicotine cigarettes has 25mg of nicotine in it. A person who smokes a pack of either type will still only have 10mg of nicotine in their blood.

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

  2. Unrelated to Goal20% picked this

    Smokers of the lowest-nicotine cigarettes available generally smoke more cigarettes per day than smokers

    This paradox is comparing people who smoke one pack of low-nicotine to people who smoke one pack of high-nicotine. The typical consumption amount of low-nicotine smokers vs. high-nicotine smokers is irrelevant. This paradox is constructed on a comparison between people smoking the same amount of cigarettes.

  3. No Impact7% picked this

    Most nicotine is absorbed into the blood of a smoker even if it is delivered

    This lets us know that when you smoke low-nicotine cigarettes, your blood absorbs most of the nicotine. So if a pack of low nicotine cigs contains 10mg and a pack of high nicotine cigs contains 25mg, we know that the person smoking the low-nicotine will absorb at least 6mg in their blood. But wouldn't the person smoking high nicotine absorb much more than that? This answer provides no way of explaining why both smokers end up with the same level of nicotine in their blood.

  4. Unrelated to Goal1% picked this

    The level of tar in cigarettes is higher in low-nicotine cigarettes than it is in

    We're only concerned with how much nicotine is in each type of smoker's blood. The level of tar doesn't have any clear connection to this conversation.

  5. Unrelated to Goal1% picked this

    When taking in nicotine by smoking cigarettes is discontinued, the level of nicotine in the

    This is telling us that once you stop smoking, the level of nicotine in your blood will recede. But that has nothing to do with our paradox about someone smoking a pack of low-nicotine vs. someone smoking a pack of high-nicotine.

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