Exercise logic.propositional.dnf
Description
Proposition to DNF
Derivation
![](http://ideas.cs.uu.nl/images/external.png)
(F /\ r) || ~~((q || ~(~p /\ ~p)) /\ (q || ~(~p /\ ~p)))
⇒ logic.propositional.idempand(F /\ r) || ~~(q || ~(~p /\ ~p))
⇒ logic.propositional.idempand(F /\ r) || ~~(q || ~~p)
⇒ logic.propositional.notnot(F /\ r) || ~~(q || p)