Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.truezeroand

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

⇒ logic.propositional.defimpl

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