Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

((((q || q) /\ (q || q)) -> r) -> q) || r

⇒ logic.propositional.idempand

(((q || q) -> r) -> q) || r

⇒ logic.propositional.idempor

((q -> r) -> q) || r