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