Exercise logic.propositional.dnf.unicode

Description
Proposition to DNF (unicode support)

Derivation

Final term is not finished

(¬(¬q ∨ p) ∨ ¬(¬q ∨ p)) ↔ (¬s ∨ (r ↔ (s ∧ s)))

⇒ logic.propositional.idempand

(¬(¬q ∨ p) ∨ ¬(¬q ∨ p)) ↔ (¬s ∨ (r ↔ s))

⇒ logic.propositional.defequiv

(¬(¬q ∨ p) ∨ ¬(¬q ∨ p)) ↔ (¬s ∨ (r ∧ s) ∨ (¬r ∧ ¬s))