Logical ReasoningDifficulty: Easy

PT149 S4 Q9 Explanation

Politician: Some proponents of unilateral

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

TopicsMain Conclusion

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Stimulus

Politician: Some proponents of unilateral nuclear arms reduction argue that it would encourage other countries to reduce their own nuclear arsenals, eventually leading to an international agreement on nuclear arms reduction. Our acting on the basis of this argument would be dangerous, because the argument ignores the countries presently on the verge cannot be relied upon to conform to any international military policy.

What this question is testing

Main Conclusion

Your task

Break the argument into its conclusion and evidence, then do exactly what the question stem asks with that structure.

Common trap

Answers that sound relevant to the topic but don't connect to the argument's actual reasoning.

Winning move

Predict what a right answer must do, then test each choice against the conclusion-evidence gap.

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 most accurately expresses the conclusion of the

Answer choices

  1. Unstated Assumption12% picked this

    Countries that are on the verge of civil wars are unlikely to agree to reduce either their nuclear

    This does not at all seem like a rephrasing of "our acting on the basis of this argument would be dangerous". This answer reflects an idea that was never said, so it can't be the Main Conclusion. This is more an assumption that undergirds the final sentence.

  2. Opposite1% picked this

    Unilateral nuclear arms reduction by the politician's country would encourage all countries to reduce

    This does not at all seem like a rephrasing of "our acting on the basis of this argument would be dangerous". This answer reflects the opinion of "some proponents", but our author's conclusion is rejecting their argument as a dangerous basis for action.

  3. Unstated / Unrelated to Goal3% picked this

    Many countries cannot be relied upon to disclose the extent of

    This does not at all seem like a rephrasing of "our acting on the basis of this argument would be dangerous". This answer talks about whether or not countries would disclose the full extent of their capability, which was unstated and undiscussed, so it can't possibly be the Main Conclusion.

  4. Unstated / Unrelated to Goal3% picked this

    It is unlikely that an international agreement on nuclear disarmament will

    This does not at all seem like a rephrasing of "our acting on the basis of this argument would be dangerous". This answer reflects an idea that was never said, so it can't be the Main Conclusion. The author is making a point about what is presently the case, whereas this answer is about the indefinite future.

  5. Correct82% picked this

    It is risky for the politician's country to unilaterally reduce nuclear arms in hopes of achieving an international

    Why this is right

    This seems like our best available rephrasing of "our acting on the basis of this argument would be dangerous". Instead of 'dangerous', they said 'risky'. Instead of 'our acting', they said "the politician's country to unilaterally reduce nuclear arms". And instead of "on the basis of this argument", they said "in hopes of achieving an international agreement on arms reduction".

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

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