Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

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

⇒ logic.propositional.idempor

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

⇒ logic.propositional.defimpl

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

⇒ logic.propositional.demorganor

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

⇒ logic.propositional.notnot

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

⇒ logic.propositional.absorpor

q || r