Exercise logic.propositional.dnf.unicode

Description
Proposition to DNF (unicode support)

Derivation

Final term is not finished

¬¬(¬(q → (p ∨ p)) ↔ ((r ↔ s) ∨ ¬s))

⇒ logic.propositional.idempor

¬¬(¬(q → p) ↔ ((r ↔ s) ∨ ¬s))