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medium · LSAT Logical Reasoning

The clinic's encrypted patient archive was breached last week. Only three staff members hold the credentials required to open that archive, and each of them denies any involvement. Because the archive cannot be opened without those credentials, the breach must have been carried out by someone on the inside. The clinic should therefore replace its entire credentialing system.

The statement that the archive cannot be opened without those credentials plays which one of the following roles in the argument?

  1. It is background information that plays no part in the argument's reasoning.
  2. It is a premise that supports the credential-replacement recommendation directly, without contributing to any intervening conclusion.
  3. It is in fact the intermediate conclusion on which the argument's final recommendation directly rests.
  4. A premise supporting an intermediate conclusion, which in turn supports the argument's main conclusion.
  5. It is the main conclusion of the argument.

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