Exercise logic.propositional.dnf.unicode

Description
Proposition to DNF (unicode support)

Derivation

Final term is not finished

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

⇒ logic.propositional.idempand

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