Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.truezeroand

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

⇒ logic.propositional.defimpl

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