Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

~(((q || q) -> r) || F) || q || r

⇒ logic.propositional.falsezeroor

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

⇒ logic.propositional.idempor

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

⇒ logic.propositional.defimpl

~(~q || r) || q || r