Question

Which of the following statements is false?

Options

• `p ∧ (∼ p)` is contradiction

• `(p → q) ↔ (∼ q → ∼ p)` is a contradiction

• `~ (∼ p) ↔ p` is a tautology

• `[(p → q) ∧ (∼ q)] → (∼ p)` is a tautology

Answer 1

`bb((p → q) ↔ (∼ q → ∼ p))` is a contradiction