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