Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.truezeroand

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

⇒ logic.propositional.defimpl

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