Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.truezeroand

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

⇒ logic.propositional.defimpl

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

⇒ logic.propositional.falsezeroor

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