Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.notnot

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