Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.idempand

~~~(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