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GATE 2023 ST – Question 6

General Aptitude · Analytical Aptitude: Logical Reasoning, Deduction and Analogy · 2 marks · Multiple choice

Based only on “Some humans are intelligent,” which inference is certain?

  1. No human is intelligent.
  2. All humans are intelligent.
  3. Some non-humans are intelligent.
  4. Some intelligent beings are humans.

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Correct answer: (D) Some intelligent beings are humans.

Explanation

The premise asserts existence of at least one being that is both human and intelligent. Reversing the order of these two properties preserves this existential intersection, giving D. It gives no information about all humans or about non-humans. **D**.

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