Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

r || (((q || q) -> r) -> q)

⇒ logic.propositional.idempor

r || ((q -> r) -> q)

⇒ logic.propositional.defimpl

r || ~(q -> r) || q

⇒ logic.propositional.defimpl

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

⇒ logic.propositional.demorganor

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

⇒ logic.propositional.notnot

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

⇒ logic.propositional.absorpor

r || q