Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.idempand

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

⇒ logic.propositional.defimpl

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