Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.notnot

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

⇒ logic.propositional.defimpl

~~(~(~q || r) || q || r)

⇒ logic.propositional.demorganor

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

⇒ logic.propositional.notnot

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