Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.notnot

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

⇒ logic.propositional.falsezeroor

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

⇒ logic.propositional.falsezeroor

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

⇒ logic.propositional.defimpl

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