Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

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

⇒ logic.propositional.falsezeroor

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

⇒ logic.propositional.absorpand

q || ~~p

⇒ logic.propositional.notnot

q || p