Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

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

⇒ logic.propositional.idempand

r || ~(~q || r) || q

⇒ logic.propositional.demorganor

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

⇒ logic.propositional.notnot

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

⇒ logic.propositional.absorpor

r || q