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.notnot

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

⇒ logic.propositional.defimpl

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