Logical ReasoningDifficulty: Medium

PT128 S3 Q17 Explanation

Environmentalist: The United Kingdom recently

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

TopicsNecessary Assumption

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Stimulus

Environmentalist: The United Kingdom recently instituted a law requiring that foods containing genetically altered ingredients be labeled accordingly. Food producers, fearing that consumers would understand the labels as warnings and thus avoid their products, rushed to rid those products of genetically altered ingredients. Other countries contemplating such labeling should therefore refrain, because would necessitate production alternatives, all of which are dangerous and pesticide intensive.

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
17.

Which one of the following is an assumption on which the environmentalist's

Answer choices

  1. Alternative Considerations12% picked this

    In general, people interpret labels stating that some food ingredients are genetically

    This is tempting. It addresses whether consumers view the labels as warnings which is an underlying thread. However, while it helps the argument, it's already wrapped into the initial setup explaining why UK producers reacted as they did.

  2. Trap2% picked this

    Before the United Kingdom instituted a law requiring that foods containing genetically altered ingredients be labeled as such, almost all foods sold

    This choice isn’t necessary. It’s not crucial to the argument whether most foods contained altered ingredients before the law. The effects of the law are more pertinent.

  3. Correct70% picked this

    The reactions of food producers in other countries to laws requiring labeling of foods containing genetically altered ingredients are likely to be similar to

    Why this is right

    The reactions of food producers in other countries to laws requiring labeling of foods containing genetically altered ingredients are likely to be similar to the reactions of food producers in the United Kingdom. This is what we'd expect. If negated, it would mean food producers in other countries might not react the same way, making the argument fall apart. The whole point is that the environmentalist is warning against similar labeling elsewhere due to predicted similar effects.

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

  4. Trap11% picked this

    Warning labels on food products have proven to be effective in reducing consumption

    This choice broadens the scope to warning labels generally, whereas the argument is specific to reactions to genetically altered labels. Not necessary for the conclusion.

  5. Trap4% picked this

    Countries that institute new food labeling regulations often experience a change in

    This choice talks about changes in consumer eating habits but doesn’t connect directly to the issue of producers switching to dangerous alternatives due to loss of demand for genetically altered crops.

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