Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.notnot

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

⇒ logic.propositional.demorganor

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