Examination Preparation

Logical Reasoning Quiz

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Test your understanding of classical Aristotelian logic, the Square of Opposition, and the intricacies of Indian Pramanas with these examination-level questions.

1. According to the Classical Square of Opposition, if the proposition 'All humans are mortal' is given as True, which of the following must be False?

  1. No humans are mortal.
  2. Some humans are mortal.
  3. Some humans are not mortal.
  4. Both A and C.
View Answer & Explanation

Correct Answer: D

Explanation: 'All humans are mortal' is an A proposition.
Its contradictory is O ('Some humans are not mortal'), which must be False.
Its contrary is E ('No humans are mortal'). Since A is True, E cannot be True, so it must be False. Thus, both A and C are false.

2. In Indian Logic (Nyaya), what does 'Vyapti' refer to?

  1. The major premise of a syllogism.
  2. The invariable concomitance between the middle term and major term.
  3. The fallacy of the unproved middle.
  4. Knowledge derived from verbal testimony.
View Answer & Explanation

Correct Answer: B

Explanation: Vyapti is the universal and invariable relationship between the Hetu (middle term / reason, e.g., smoke) and the Sadhya (major term, e.g., fire) that guarantees the inference.

3. Recognizing a new animal based on a description previously given by someone else is an example of which Pramana?

  1. Anumana (Inference)
  2. Arthapatti (Implication)
  3. Upamana (Comparison)
  4. Pratyaksha (Perception)
View Answer & Explanation

Correct Answer: C

Explanation: Upamana (Comparison) is the knowledge of the relation between a name and the object it denotes, based on a given description or similarity.

4. In the statement "The hill has fire because it has smoke", what does "smoke" represent in terms of Nyaya syllogism?

  1. Paksha
  2. Sadhya
  3. Hetu
  4. Vyapti
View Answer & Explanation

Correct Answer: C

Explanation: Smoke is the Hetu (or Linga), which is the reason or middle term used to prove the presence of fire (Sadhya) on the hill (Paksha).