Exercise logic.propositional.dnf.unicode

Description
Proposition to DNF (unicode support)

Derivation

Final term is not finished

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

⇒ logic.propositional.idempand

¬¬(¬(q → p) ↔ ((¬¬r ↔ s) ∨ ¬s))

⇒ logic.propositional.defimpl

¬¬(¬(¬q ∨ p) ↔ ((¬¬r ↔ s) ∨ ¬s))