Exercise logic.propositional.dnf.unicode

Description
Proposition to DNF (unicode support)

Derivation

Final term is not finished

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

⇒ logic.propositional.idempor

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