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