Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.idempand

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

⇒ logic.propositional.notnot

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

⇒ logic.propositional.defimpl

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