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WBCS Preliminary Examination 2021 — General Studies · Question 195 of 200

Q195
ReasoningSyllogism & Logical Deduction
Exclusive Proposition: Which is the correct option? All students are not genius.
  1. a.Every student is not genius.
  2. b.Many students are not genius.
  3. c.Many students are genius.
  4. d.Every non-student is a genius.

Answer: (B) Many students are not genius.

'All students are not genius' is logically the denial of 'all students are genius': it asserts that at least some students are not genius. The option that preserves this sense is 'Many students are not genius'. Option (A), 'Every student is not genius', would mean that no student is a genius, which is too strong; option (C) is something the statement may suggest but does not assert; option (D), about non-students, has no basis. In standard logic, 'All S are not P' is read as the particular negative 'Some S are not P'.

Q194 Whole paperQ196