Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.idempand

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

⇒ logic.propositional.defimpl

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