Which of the following is false? Read ∧ as AND, ∨ as OR, ¬ as NOT, → as…

1996

Which of the following is false? Read ∧ as AND, ∨ as OR, ¬ as NOT, → as one-way implication and ↔ as two-way implication

  1. A.

    ((x → y) ∧ x) → y

  2. B.

    ((¬x → y) ∧ (¬x → ¬y)) → x

  3. C.

    (x → (x ∨ y))

  4. D.

    ((x ∨ y) ↔ (¬x → ¬y))

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Correct answer: D

option D is false, All other options are true.

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