Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.defimpl

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

⇒ logic.propositional.falsezeroor

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