Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.defimpl

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

⇒ logic.propositional.falsezeroor

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