Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.idempand

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

⇒ logic.propositional.defimpl

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