Logical ReasoningDifficulty: Hard

PT9 S2 Q7 Explanation

Waste management companies, which collect waste

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

TopicsWeaken

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Stimulus

Waste management companies, which collect waste for disposal in landfills and incineration plants, report that disposable plastics make up an ever-increasing percentage of the waste they handle. It is clear that attempts to decrease throw away in the garbage are failing.

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
7.

Which one of the following, if true, most seriously weakens

Answer choices

  1. No Impact9% picked this

    Because plastics create harmful pollutants when burned, an increasing percentage of the plastics handled by waste management companies are

    Whether plastics are being increasingly disposed of in landfills rather than incinerated doesn't directly address whether efforts to decrease plastic waste are failing. This change in disposal method doesn't inherently affect the amount of plastic being thrown away.

  2. No Impact23% picked this

    Although many plastics are recyclable, most of the plastics disposed of by waste management

    It seemed more or less implied by the stimulus that disposable plastic means it's not-recyclable. So this seems to be telling us what we already know. It reiterates that these trash companies are dealing with a lot of plastic that needs to be incinerated or put in a landfill.

  3. Irrelevant Comparison11% picked this

    People are more likely to save and reuse plastic containers than containers made of heavier materials

    This is almost in our desired direction, because save and reusing plastic containers would mean we're NOT putting them in the garbage, which is what we want to argue. But this answer has no time dimension to it. It doesn't give us a way to argue that are efforts are working to change things, because it doesn't speak to anything changing.

  4. Correct50% picked this

    An increasing proportion of the paper, glass, and metal cans that waste management companies used to handle

    Why this is right

    Wow, so it WAS a percentage vs. amount type of game they were playing. This answer is telling us there's less non-plastic trash. That means that even if we had the same volume of plastic trash as before, it would now be a higher percentage of trash. It makes the evidence way less compelling because we can't trust that "a higher percentage of plastic trash = there's more plastic trash than before".

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

  5. Opposite (if anything)7% picked this

    While the percentage of products using plastic packaging is increasing, the total amount of plastic being

    Since the total amount of plastic being manufactured has remained unchanged, if anything, this answer aligns with the ideas that "efforts to reduce plastic trash have not worked". Ultimately it has no impact because it's about manufacturing, and we really care about disposal.

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