Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.truezeroand

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

⇒ logic.propositional.defimpl

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