Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.defimpl

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

⇒ logic.propositional.defimpl

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

⇒ logic.propositional.idempor

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