Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.truezeroand

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

⇒ logic.propositional.defimpl

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