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)
⇒ logic.propositional.absorporT /\ (q || r)