Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

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

⇒ logic.propositional.absorpand

~~q || ~~p || F

⇒ logic.propositional.falsezeroor

~~q || ~~p

⇒ logic.propositional.notnot

q || ~~p

⇒ logic.propositional.notnot

q || p