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.defimpl

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