Exercise logic.propositional.dnf.unicode

Description
Proposition to DNF (unicode support)

Derivation

Final term is not finished

(¬(q → p) ↔ (¬¬¬s ∨ (r ↔ s))) ∨ F

⇒ logic.propositional.notnot

(¬(q → p) ↔ (¬s ∨ (r ↔ s))) ∨ F