Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.truezeroand

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

⇒ logic.propositional.truezeroand

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

⇒ logic.propositional.defimpl

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