Logical ReasoningDifficulty: Medium

PT150 S2 Q9 Explanation

Yu: The menu at Jason’s Restaurant

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

TopicsWeaken

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Stimulus

Yu: The menu at Jason’s Restaurant states that no food served there contains products grown with chemical pesticides, but this cannot be true. I recently visited Kelly’s Grocery, where Jason goes personally to buy the restaurant's produce, and I noticed workers unloading produce from uses chemical pesticides on all of its crops.

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
9.

Which one of the following, if true, most undermines

Answer choices

  1. Strengthen, if anything4% picked this

    Jason does not know that Kelly’s Grocery buys produce

    If Jason is oblivious to the risk that he may be buying MegaFarm's insecticide-laced produce, then that would help the author. At best, it has no impact on the argument.

  2. No Impact15% picked this

    Jason buys ingredients from several suppliers besides Kelly’s Grocery, and those suppliers sell only products that are

    This only establishes that some other ingredients at Jason's Restaurant aren't grown with pesticides, but the author's argument would still be alive and well. She isn't arguing that ALL of Jason's ingredients are grown with pesticides, just that at least some of them are. She's built a case that suggests that Jason is buying produce grown with pesticides from Kelly's, so our answer needs to help us shoot down that storyline.

  3. Correct77% picked this

    At Kelly’s Grocery, most of the produce items that are grown without chemical pesticides carry a label

    Why this is right

    This allows us to say, "Sure Jason buys the restaurant's produce from Kelly's, and sure Kelly's stocks some produce from MegaFarm that is grown with pesticides, but Jason doesn't buy that stuff. He only buys stuff that is labeled pesticide-free." The fact that this says most, not all, doesn't really matter to us. It leaves room for the fact that some items that are pesticide-free don't have that label. So what? Jason, being conscientious about whether pesticides have been used on the produce he's buying, would not buy that unlabeled stuff (even though it would qualify for his high standards). All we care about is that there is a way for him to buy stuff that he knows IS pesticide-free, so if he sticks to the labeled stuff, then he's only buying pesticide free produce.

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

  4. Out of Scope: safe2% picked this

    None of the farms that supply produce to Kelly’s Grocery use any pesticide that has not been approved by the government as

    This argument isn't evaluating whether it's good / bad / safe / unsafe to use produce that was grown with pesticides. It's only examining the truth of Jason's claim that none of his ingredients were grown that way.

  5. Out of Scope: most people1% picked this

    Most people who buy produce at Kelly’s Grocery would never knowingly buy produce grown with

    We only care about Jason's shopping behavior at Kelly's. What other customers do is immaterial to this argument.

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