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.idempand

¬¬¬(q → p) ↔ ¬¬((r ↔ s) ∨ ¬s)