Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

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

⇒ logic.propositional.notnot

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

⇒ logic.propositional.idempor

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