Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

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

⇒ logic.propositional.notnot

(p -> q) || q || p

⇒ logic.propositional.defimpl

~p || q || q || p

⇒ logic.propositional.idempor

~p || q || p