Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.defimpl

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

⇒ logic.propositional.falsezeroor

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