Exercise logic.propositional.dnf
Description
Proposition to DNF
Derivation
![](http://ideas.cs.uu.nl/images/external.png)
T /\ (q || r || ~(q -> r))
⇒ logic.propositional.defimplT /\ (q || r || ~(~q || r))
⇒ logic.propositional.demorganorT /\ (q || r || (~~q /\ ~r))
⇒ logic.propositional.notnotT /\ (q || r || (q /\ ~r))