Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.notnot

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

⇒ logic.propositional.demorganor

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