Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

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

⇒ logic.propositional.falsezeroor

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

⇒ logic.propositional.notnot

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

⇒ logic.propositional.absorpand

q || p