medium · LSAT Logical Reasoning

The mayor's proposed policy to reduce traffic is clearly effective, as no critic has yet been able to prove that it will fail to achieve its stated goals.

The reasoning in the argument above is most vulnerable to criticism on the grounds that it

  1. Fails to consider that the effectiveness of the policy might vary over time.
  2. Concludes that a policy is effective simply because it has been proposed by an authority figure.
  3. Treats the mere absence of a disproof as if it amounted to affirmative support for the claim.
  4. Takes for granted that the mayor's critics are motivated by political bias.
  5. Assumes that a policy no one has disproven must succeed in every city that adopts it.

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