Exercise logic.propositional.dnf.unicode

Description
Proposition to DNF (unicode support)

Derivation

Final term is not finished

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

⇒ logic.propositional.idempand

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