Logical ReasoningDifficulty: Medium

PT116 S3 Q8 Explanation

Studies suggest that, for the

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

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Stimulus

Studies suggest that, for the vast majority of people who have normal blood pressure, any amount of sodium greater than that required by the body is simply excreted and does not significantly raise blood pressure. So only persons who have high blood pressure excess sodium need to restrict their sodium intake.

What this question is testing

Weaken

Your task

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

Common trap

Answers that look negative but attack a claim the argument never relied on.

Winning move

Find the assumption the argument depends on, then pick the choice that undermines 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
8.

Which one of the following, if true, would most seriously weaken

Answer choices

  1. No Impact0% picked this

    High blood pressure is more harmful than was

    This doesn't give us a way to argue that people with NORMAL blood pressure should reduce sodium intake, since it's about high blood pressure.

  2. No Impact8% picked this

    High blood pressure is sometimes exacerbated by intake of more sodium than

    This choice also focuses on people who have high blood pressure, which doesn't give us a way to argue that people with NORMAL blood pressure need to watch their sodium intake.

  3. Correct80% picked this

    Excess sodium intake over time often destroys the body’s ability to

    Why this is right

    This introduces the idea that excess sodium can eventually impair the body's ability to process it, suggesting that even those with normal blood pressure might face future health issues if they don't restrict sodium, thereby challenging the conclusion that they don't need to be cautious.

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

  4. Strengthens5% picked this

    Every human being has a physiological need for at least

    This asserts that humans need some sodium, which the argument already accepts. It does not challenge the claim about excess intake and its need for restriction.

  5. No Impact7% picked this

    Any sodium not used by the body will increase blood pressure unless

    This statement describes conditions under which sodium would raise blood pressure, but since the premise states that excess sodium is usually excreted, it doesn't practically impact the argument for people with normal blood pressure.

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