Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.idempand

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

⇒ logic.propositional.defimpl

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