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