Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

((F || q) /\ (r || q)) || F || ~~p

⇒ logic.propositional.falsezeroor

(q /\ (r || q)) || F || ~~p

⇒ logic.propositional.absorpand

q || F || ~~p