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Public Service Entrance Exam (PSEE) · Question

If all dogs are mammals, and all mammals are animals, then which conclusion is necessarily true?

This is a classic syllogism. If dogs are a subset of mammals, and mammals are a subset of animals, then dogs must also be a subset of animals.

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Question: If all dogs are mammals, and all mammals are animals, then which conclusion is necessarily true?

Answer options: ✅ All dogs are animals.

  • All animals are dogs.
  • Some animals are not mammals.
  • No dogs are animals.

Correct answer: All dogs are animals.

Explanation: This is a classic syllogism. If dogs are a subset of mammals, and mammals are a subset of animals, then dogs must also be a subset of animals.

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