Exercise logic.propositional.dnf.unicode

Description
Proposition to DNF (unicode support)

Derivation

Final term is not finished

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

⇒ logic.propositional.idempand

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

⇒ logic.propositional.defimpl

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