Logical ReasoningDifficulty: Hard

PT123 S3 Q21 Explanation

Ethicist: On average animals raised on

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

TopicsWeaken

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Stimulus

Ethicist: On average, animals raised on grain must be fed sixteen pounds of grain to produce one pound of meat. A pound of meat is more nutritious for humans than a pound of grain, but sixteen pounds of grain could feed many more people than could a pound of meat. With grain must accept the fact that consumption of meat will soon be morally unacceptable.

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
21.

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

Answer choices

  1. Too Weak5% picked this

    Even though it has been established that a vegetarian diet can be healthy, many people prefer to eat meat and are

    That many people prefer to eat meat is too weak to impact whether eating meat will soon be morally unacceptable.

  2. Correct57% picked this

    Often, cattle or sheep can be raised to maturity on grass from pastureland that is unsuitable for any

    Why this is right

    This points out a possibility where raising cattle does not come at the expense of growing grain and eating meat never becomes morally unacceptable.

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

  3. Strengthens5% picked this

    If a grain diet is supplemented with protein derived from non-animal sources, it can have nutritional value equivalent to that

    This makes the conclusion more likely to be true by making meat less critical to human health.

  4. Too Weak5% picked this

    Although prime farmland near metropolitan areas is being lost rapidly to suburban development, we could reverse this trend by choosing to live

    That prime farmland near metropolitan areas is being lost rapidly does not challenge the premise that large areas of farmland are going out of production each year.

  5. Too Weak28% picked this

    Nutritionists agree that a diet composed solely of grain products is not adequate

    The argument never advocates a diet solely of grain products. So long as a diet without meat can provide sufficient nutritional value, it doesn’t matter whether that nutrition is coming from grains, vegetables, fruits, or anything else besides meat.

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