Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.truezeroand

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

⇒ logic.propositional.demorganor

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