Logical ReasoningDifficulty: Medium

PT105 S1 Q8 Explanation

Economist: In the interaction between

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

TopicsNecessary Assumption

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Stimulus

Economist: In the interaction between producers and consumers, the only obligation that all parties have is to act in the best interests of their own side. And distribution of information about product defects is in the best interests of the consumer. So consumers are while producers are never obligated to reveal them.

What this question is testing

Necessary Assumption

Your task

Find the assumption the argument requires in order for its conclusion to hold.

Common trap

Answers that would help the argument but aren't strictly required (sufficient, not necessary).

Winning move

Negate each choice — the right one breaks the argument when negated.

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 is an assumption required by the

Answer choices

  1. Correct74% picked this

    It is never in the best interests of producers for a producer to reveal

    Why this is right

    This is what we were looking for. It just feels strong because of the "never", since we're always wary of accusing an author of Too Strong an assumption on Necessary Assumption. But it's not automatically wrong because it's strongly worded. It just means that we have to check the strength of the conclusion to see whether the author really was thinking in terms as black and white as conditional language. This conclusion says that producers are never obligated to reveal defects. We could defeat this conclusion with one measly counterexample where a producer was obligated to reveal defects because it was in their best interests. If we negated this answer choice, that's precisely what we'd get: at least sometimes, it's in the best interests of producers to reveal a product defect. thus, at least sometimes, producers are obligated to reveal a product defect. That would contradict the conclusion (the correct answer, when negated, doesn't need to contradict the conclusion. It just needs to weaken the argument, but here it would seemingly refute the argument.)

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

  2. Out of Scope: expects7% picked this

    No one expects producers to act in a manner counter to their

    The author is never talking about what people do or don't expect, so we have no way to say that the author is assuming anything about what people expect. If we negated this answer and said, "at least one person expects producers to act in a manner counter to their best interests", it wouldn't weaken, especially since we have no idea what is / isn't in the best interests of producers.

  3. Too Strong: any2% picked this

    Any product defect is likely to be discovered

    The author has not committed herself to an insanely strong notion that 100% of product defects are likely to be discovered. As it pertains to discovering defects, the only thing the author has said is that "when a consumer discovers one, they are always obligated to report it".

  4. Unknown Comparison: more likely5% picked this

    A product defect is more likely to be discovered by a consumer than

    The author never said anything indicating whether it's more likely that a consumer or a producer would discover a defect.

  5. Too Strong: never13% picked this

    The best interests of consumers never coincide with the best interests

    The author has to assume that, when it comes to product defects, the best interests of consumers never coincide with those of producers. But she doesn't have to assume it never happens. Maybe when it comes to environmental regulations, the best interests of consumers and producers converge.

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