Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.idempor

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

⇒ logic.propositional.idempor

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