Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.notnot

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

⇒ logic.propositional.defimpl

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